diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..7d5bffa
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,32 @@
+name: Java CI with Maven
+
+on:
+  push:
+    branches: [ "main", "master" ]
+  pull_request:
+    branches: [ "main", "master" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@v4
+
+    - name: Set up JDK 17
+      uses: actions/setup-java@v4
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: maven # Optional: Caches Maven dependencies
+
+    - name: Build with Maven
+      run: mvn -B package --file pom.xml
+
+    - name: Upload JAR artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: stardust-jar
+        path: target/stardust-0.0.1.jar
+        if-no-files-found: error
diff --git a/README.md b/README.md
index c500713..bb9d2e5 100644
--- a/README.md
+++ b/README.md
@@ -4,11 +4,40 @@ STARDUST is a framework for spectrum-based fault localization (SBFL).
 The framework was used to conduct experiments with SBFL during my bachelor thesis.
 
 
+## Requirements
+
+This project requires Java 17 or newer to build and run.
+
+
 ## Installation
 
 STARDUST uses [maven](https://maven.apache.org/) as its build tool.
 The `pom.xml` file contains all dependencies you need in order to run the framework.
 
+### Using the Published Artifact
+
+Successful builds on the `main` or `master` branch publish a JAR artifact named `stardust-jar`. You can download this artifact by following these steps:
+
+1.  Navigate to the **Actions** tab of the GitHub repository.
+2.  Select the **Java CI with Maven** workflow from the list of workflows.
+3.  Choose a successful run (usually marked with a green checkmark).
+4.  Scroll down to the **Artifacts** section at the bottom of the run page.
+5.  Download the `stardust-jar` artifact. This will typically be a ZIP file containing `stardust-0.0.1.jar`.
+
+Once downloaded and unzipped, you can run specific functionalities using a command similar to this:
+
+```bash
+java -cp stardust-0.0.1.jar fk.stardust.evaluation.sbfl.CreateRankings [args]
+```
+(Replace `[args]` with any arguments required by the chosen main class.)
+
+
+## Build Status
+
+![Build Status](https://github.com/FaKeller/stardust/actions/workflows/ci.yml/badge.svg)
+
+This project uses GitHub Actions to automatically run tests and build the project upon commits and pull requests, ensuring code quality and integration.
+
 
 ## Theoretical Background
 
diff --git a/pom.xml b/pom.xml
index 36ef923..959c81b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -40,36 +40,30 @@
 
 		<!-- library dependencies -->
 		<dependency>
-			<groupId>jdom</groupId>
-			<artifactId>jdom</artifactId>
-			<version>1.1</version>
+      <groupId>org.jdom</groupId>
+      <artifactId>jdom2</artifactId>
+      <version>2.0.6.1</version>
 		</dependency>
 
 		<!-- weka machine learning -->
 		<dependency>
 			<groupId>nz.ac.waikato.cms.weka</groupId>
-			<artifactId>weka-dev</artifactId>
-			<version>3.7.10</version>
+      <artifactId>weka-stable</artifactId>
+      <version>3.8.6</version>
 			<scope>compile</scope>
 		</dependency>
 		<dependency>
-			<groupId>nz.ac.waikato.cms.weka</groupId>
-			<artifactId>LibSVM</artifactId>
-			<version>1.0.5</version>
+      <groupId>tw.edu.ntu.csie</groupId>
+      <artifactId>libsvm</artifactId>
+      <version>3.30</version>
 			<scope>compile</scope>
-			<exclusions>
-				<exclusion>
-					<groupId>nz.ac.waikato.cms.weka</groupId>
-					<artifactId>weka-dev</artifactId>
-				</exclusion>
-			</exclusions>
 		</dependency>
 
 		<!-- QA dependencies -->
 		<dependency>
 			<groupId>org.testng</groupId>
 			<artifactId>testng</artifactId>
-			<version>6.8.5</version>
+      <version>7.7.1</version>
 			<scope>test</scope>
 		</dependency>
 		<!-- <dependency>
@@ -127,7 +121,12 @@
 			</plugin>
 			<plugin>
 				<artifactId>maven-surefire-plugin</artifactId>
-				<version>2.14.1</version>
+				<version>3.1.2</version>
+				<configuration>
+				  <suiteXmlFiles>
+					<suiteXmlFile>src/test/resources/testng.xml</suiteXmlFile>
+				  </suiteXmlFiles>
+				</configuration>
 			</plugin>
 			<plugin>
 				<artifactId>maven-jar-plugin</artifactId>
@@ -140,8 +139,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.1</version>
 				<configuration>
-					<source>1.8</source>
-					<target>1.8</target>
+          <source>17</source>
+          <target>17</target>
 
 					<forceJavacCompilerUse>true</forceJavacCompilerUse>
 				</configuration>
diff --git a/src/main/java/fk/stardust/evaluation/ibugs/HierarchicalExperiment.java b/src/main/java/fk/stardust/evaluation/ibugs/HierarchicalExperiment.java
index 09614b7..1e58fa8 100644
--- a/src/main/java/fk/stardust/evaluation/ibugs/HierarchicalExperiment.java
+++ b/src/main/java/fk/stardust/evaluation/ibugs/HierarchicalExperiment.java
@@ -20,10 +20,10 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import org.jdom.Document;
-import org.jdom.Element;
-import org.jdom.JDOMException;
-import org.jdom.input.SAXBuilder;
+import org.jdom2.Document;
+import org.jdom2.Element;
+import org.jdom2.JDOMException;
+import org.jdom2.input.SAXBuilder;
 
 import fk.stardust.evaluation.IExperiment;
 import fk.stardust.localizer.Ranking;
@@ -147,8 +147,8 @@ public void conduct() throws Exception {
         }
 
         System.out.println(String.format("Wasted Effort: %d", maxWastedEffort));
-        System.out.println(String.format("Percentage examined: %f", new Double(maxWastedEffort * 100)
-        / new Double(s.getNodes().size())));
+        System.out.println(String.format("Percentage examined: %f", (double) (maxWastedEffort * 100)
+        / (double) (s.getNodes().size())));
         System.out.println(String.format("Last examined node: %s", lastExaminedNode.toString()));
     }
 
@@ -211,11 +211,11 @@ private String getFileExtension(final File file) {
     private Set<INode<String>> getRealFaultLocations(final ISpectra<String> spectra) throws JDOMException, IOException {
         final Set<INode<String>> locations = new HashSet<>();
         final String repository = this.root.getAbsolutePath() + "/repository.xml";
-        final Document doc = new SAXBuilder().build(repository);
+        final SAXBuilder saxBuilder = new SAXBuilder();
+        final Document doc = saxBuilder.build(repository);
 
         // loop over all packages of the trace file
-        for (final Object bugObject : doc.getRootElement().getChildren()) {
-            final Element bug = (Element) bugObject;
+        for (final Element bug : doc.getRootElement().getChildren()) {
 
             // skip irrelevant bugs
             if (this.bugId != Integer.parseInt(bug.getAttributeValue("id"))) {
@@ -223,8 +223,7 @@ private Set<INode<String>> getRealFaultLocations(final ISpectra<String> spectra)
             }
 
             // get files
-            for (final Object fileObject : bug.getChild("fixedFiles").getChildren()) {
-                final Element file = (Element) fileObject;
+            for (final Element file : bug.getChild("fixedFiles").getChildren()) {
                 final String filename = file.getAttributeValue("name");
                 final String extension = filename.substring(filename.length() - 5);
                 if (extension.compareTo(".java") != 0 || filename.toLowerCase().indexOf("test") != -1) {
diff --git a/src/main/java/fk/stardust/evaluation/ibugs/IBugsFaultLocations.java b/src/main/java/fk/stardust/evaluation/ibugs/IBugsFaultLocations.java
index 2cda3fd..e5d1066 100644
--- a/src/main/java/fk/stardust/evaluation/ibugs/IBugsFaultLocations.java
+++ b/src/main/java/fk/stardust/evaluation/ibugs/IBugsFaultLocations.java
@@ -21,10 +21,10 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import org.jdom.Document;
-import org.jdom.Element;
-import org.jdom.JDOMException;
-import org.jdom.input.SAXBuilder;
+import org.jdom2.Document;
+import org.jdom2.Element;
+import org.jdom2.JDOMException;
+import org.jdom2.input.SAXBuilder;
 
 import fk.stardust.provider.CoberturaProvider;
 import fk.stardust.traces.INode;
@@ -79,11 +79,11 @@ public IBugsFaultLocations(final java.io.File file) throws JDOMException, IOExce
      * @throws JDOMException
      */
     private void parse(final java.io.File faultLocationFile) throws JDOMException, IOException {
-        final Document doc = new SAXBuilder().build(faultLocationFile);
+        final SAXBuilder saxBuilder = new SAXBuilder();
+        final Document doc = saxBuilder.build(faultLocationFile);
 
         // loop over all bugs of the real fault locations file
-        for (final Object bugObject : doc.getRootElement().getChildren()) {
-            final Element bug = (Element) bugObject;
+        for (final Element bug : doc.getRootElement().getChildren()) {
 
             // create bug object
             Bug curBug;
@@ -98,9 +98,8 @@ private void parse(final java.io.File faultLocationFile) throws JDOMException, I
 
 
             // get files
-            for (final Object fileObject : bug.getChildren()) {
-                final Element file = (Element) fileObject;
-                final String filename = file.getAttributeValue("name");
+            for (final Element fileElement : bug.getChildren()) {
+                final String filename = fileElement.getAttributeValue("name");
 
                 // ensure we have java extension and no test sources
                 if (filename == null || FileUtils.getFileExtension(filename).compareTo("java") != 0
@@ -114,8 +113,7 @@ private void parse(final java.io.File faultLocationFile) throws JDOMException, I
 
 
                 // get involved lines
-                for (final Object lineObj : file.getChildren()) {
-                    final Element line = (Element) lineObj;
+                for (final Element line : fileElement.getChildren()) {
 
                     // parse line info
                     int lineNumber;
diff --git a/src/main/java/fk/stardust/evaluation/ibugs/IBugsSpectraProvider.java b/src/main/java/fk/stardust/evaluation/ibugs/IBugsSpectraProvider.java
index f6c85de..4bf822a 100644
--- a/src/main/java/fk/stardust/evaluation/ibugs/IBugsSpectraProvider.java
+++ b/src/main/java/fk/stardust/evaluation/ibugs/IBugsSpectraProvider.java
@@ -129,21 +129,18 @@ public ISpectra<String> loadSpectra() throws Exception {
      */
     private Map<String, Boolean> traces() {
         final Map<String, Boolean> traces = new HashMap<>();
-        for (final File trace : this.bugFolder.listFiles(new FileFilter() {
-            @Override
-            public boolean accept(final File pathname) {
-                if (!pathname.isFile()) {
-                    return false;
-                }
-                final String fileExtension = FileUtils.getFileExtension(pathname);
-                if (0 != "xml".compareTo(fileExtension)) {
-                    return false;
-                }
-                if (!pathname.getName().matches("^[pf]_.+")) {
-                    return false;
-                }
-                return true;
+        for (final File trace : this.bugFolder.listFiles(pathname -> {
+            if (!pathname.isFile()) {
+                return false;
+            }
+            final String fileExtension = FileUtils.getFileExtension(pathname);
+            if (0 != "xml".compareTo(fileExtension)) {
+                return false;
+            }
+            if (!pathname.getName().matches("^[pf]_.+")) {
+                return false;
             }
+            return true;
         })) {
             final boolean success = trace.getName().matches("^p_.+");
             traces.put(trace.getAbsolutePath(), success);
diff --git a/src/main/java/fk/stardust/evaluation/lines/LineEvaluator.java b/src/main/java/fk/stardust/evaluation/lines/LineEvaluator.java
index e946af1..33b830d 100644
--- a/src/main/java/fk/stardust/evaluation/lines/LineEvaluator.java
+++ b/src/main/java/fk/stardust/evaluation/lines/LineEvaluator.java
@@ -62,7 +62,7 @@ public static void perf(final String id) {
             System.out.println(String.format("-- Begin: %s", id));
         } else {
             final long duration = System.currentTimeMillis() - benchmarks.get(id);
-            System.out.println(String.format("-- End: %s, Duration: %fs", id, new Double(duration) / 1000d));
+            System.out.println(String.format("-- End: %s, Duration: %fs", id, (double) duration / 1000d));
             benchmarks.remove(id);
         }
     }
diff --git a/src/main/java/fk/stardust/evaluation/sbfl/CreateRankings.java b/src/main/java/fk/stardust/evaluation/sbfl/CreateRankings.java
index 6522a47..08a0e53 100644
--- a/src/main/java/fk/stardust/evaluation/sbfl/CreateRankings.java
+++ b/src/main/java/fk/stardust/evaluation/sbfl/CreateRankings.java
@@ -23,7 +23,7 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import org.jdom.JDOMException;
+import org.jdom2.JDOMException;
 
 import fk.stardust.evaluation.ibugs.Experiment;
 import fk.stardust.evaluation.ibugs.IBugsFaultLocations;
@@ -341,7 +341,7 @@ private String bench(final String id) {
                 // existing benchmark
                 final long duration = now - this.benchmarks.get(id);
                 this.benchmarks.remove(id);
-                return String.format("%f s", new Double(duration / 1000.0d));
+                return String.format("%f s", duration / 1000.0d);
             } else {
                 this.benchmarks.put(id, now);
                 return null;
diff --git a/src/main/java/fk/stardust/evaluation/sir/SIRExperiment.java b/src/main/java/fk/stardust/evaluation/sir/SIRExperiment.java
index 6fc05eb..d3db68f 100644
--- a/src/main/java/fk/stardust/evaluation/sir/SIRExperiment.java
+++ b/src/main/java/fk/stardust/evaluation/sir/SIRExperiment.java
@@ -149,8 +149,8 @@ private double tarantula(final String line) {
             final int cNF = Integer.parseInt(parts[3].trim());
 
             // tarantula
-            final double part = new Double(cIF) / new Double(cIF + cNF);
-            return part / new Double(part + cIP / new Double(cIP + cNP));
+            final double part = (double) cIF / (double) (cIF + cNF);
+            return part / (part + (double) cIP / (double) (cIP + cNP));
         }
 
         public Ranking<Integer> getRanking() {
diff --git a/src/main/java/fk/stardust/localizer/Ranking.java b/src/main/java/fk/stardust/localizer/Ranking.java
index 4186dc5..a92452f 100644
--- a/src/main/java/fk/stardust/localizer/Ranking.java
+++ b/src/main/java/fk/stardust/localizer/Ranking.java
@@ -341,7 +341,7 @@ public int getWorstRanking() {
          * @return minWastedEffort
          */
         public double getMinWastedEffort() {
-            return new Double(this.bestRanking - 1) / new Double(Ranking.this.nodes.size());
+            return (double) (this.bestRanking - 1) / (double) Ranking.this.nodes.size();
         }
 
         /**
@@ -350,7 +350,7 @@ public double getMinWastedEffort() {
          * @return maxWastedEffort
          */
         public double getMaxWastedEffort() {
-            return new Double(this.worstRanking - 1) / new Double(Ranking.this.nodes.size());
+            return (double) (this.worstRanking - 1) / (double) Ranking.this.nodes.size();
         }
 
         /**
diff --git a/src/main/java/fk/stardust/localizer/extra/FusingFaultLocalizer.java b/src/main/java/fk/stardust/localizer/extra/FusingFaultLocalizer.java
index 9ff804a..4744070 100644
--- a/src/main/java/fk/stardust/localizer/extra/FusingFaultLocalizer.java
+++ b/src/main/java/fk/stardust/localizer/extra/FusingFaultLocalizer.java
@@ -158,8 +158,7 @@ public Ranking<T> localize(final ISpectra<T> spectra) {
         }
 
         // compute top-K nodes per ranking metric
-        final int k = new Double(spectra.getNodes().size() * 0.1 < 10 ? 10 : spectra.getNodes().size() * 0.1)
-        .intValue();
+        final int k = (int) (spectra.getNodes().size() * 0.1 < 10 ? 10 : spectra.getNodes().size() * 0.1);
         final Map<IFaultLocalizer<T>, Set<INode<T>>> topK = this.topK(sbflRankings, k);
 
 
@@ -242,7 +241,7 @@ protected List<IFaultLocalizer<T>> selectOverlapBased(final ISpectra<T> spectra,
         final Map<IFaultLocalizer<T>, Double> sortby = new HashMap<>();
         for (final IFaultLocalizer<T> fl : rankings.keySet()) {
             // score
-            final double oRate = new Double(all.size() - topK.get(fl).size()) / new Double(all.size());
+            final double oRate = (double) (all.size() - topK.get(fl).size()) / (double) all.size();
             sortby.put(fl, oRate);
         }
 
@@ -288,7 +287,7 @@ protected List<IFaultLocalizer<T>> selectBiasBased(final ISpectra<T> spectra,
                 numSum += lAll.get(curNode);
             }
 
-            bias.put(fl, 1.0d - new Double(numSum) / (Math.sqrt(new Double(lSum)) * Math.sqrt(new Double(lAllSum))));
+            bias.put(fl, 1.0d - (double) numSum / (Math.sqrt((double) lSum) * Math.sqrt((double) lAllSum)));
         }
 
         // select'em
diff --git a/src/main/java/fk/stardust/localizer/machinelearn/WekaFaultLocalizer.java b/src/main/java/fk/stardust/localizer/machinelearn/WekaFaultLocalizer.java
index 0d04d5e..bd9d9a5 100644
--- a/src/main/java/fk/stardust/localizer/machinelearn/WekaFaultLocalizer.java
+++ b/src/main/java/fk/stardust/localizer/machinelearn/WekaFaultLocalizer.java
@@ -92,8 +92,8 @@ public Ranking<T> localize(final ISpectra<T> spectra) {
         tf.add("f");
 
         // create an attribute for each component
-        final Map<INode<T>, Attribute> attributeMap = new HashMap<INode<T>, Attribute>();
-        final ArrayList<Attribute> attributeList = new ArrayList<Attribute>(); // NOCS: Weka needs ArrayList..
+        final Map<INode<T>, Attribute> attributeMap = new HashMap<>();
+        final ArrayList<Attribute> attributeList = new ArrayList<>(); // NOCS: Weka needs ArrayList..
         for (final INode<T> node : nodes) {
             final Attribute attribute = new Attribute(node.toString(), tf);
             attributeList.add(attribute);
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Ample.java b/src/main/java/fk/stardust/localizer/sbfl/Ample.java
index 2dd81de..408a9c6 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Ample.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Ample.java
@@ -28,8 +28,8 @@ public Ample() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        final Double left = new Double(node.getIF()) / new Double(node.getIF() + node.getNF());
-        final Double right = new Double(node.getIS()) / new Double(node.getIS() + node.getNS());
+        final double left = (double) node.getIF() / (double) (node.getIF() + node.getNF());
+        final double right = (double) node.getIS() / (double) (node.getIS() + node.getNS());
         return Math.abs(left - right);
     }
 
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Anderberg.java b/src/main/java/fk/stardust/localizer/sbfl/Anderberg.java
index 860c3cc..6bb157e 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Anderberg.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Anderberg.java
@@ -28,7 +28,7 @@ public Anderberg() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF()) / new Double(node.getIF() + 2.0d * (node.getNF() + node.getIS()));
+        return (double) node.getIF() / (double) (node.getIF() + 2.0d * (node.getNF() + node.getIS()));
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/ArithmeticMean.java b/src/main/java/fk/stardust/localizer/sbfl/ArithmeticMean.java
index 6ee2fe0..2f8d653 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/ArithmeticMean.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/ArithmeticMean.java
@@ -32,8 +32,8 @@ public double suspiciousness(final INode<T> node) {
         final double enu2 = 2 * node.getNF() * node.getIS();
         final double enu = enu1 - enu2;
 
-        final double denom1 = (node.getIF() + node.getIS()) * (node.getNS() + node.getNF());
-        final double denom2 = (node.getIF() + node.getNF()) * (node.getIS() + node.getNS());
+        final double denom1 = (double) (node.getIF() + node.getIS()) * (node.getNS() + node.getNF());
+        final double denom2 = (double) (node.getIF() + node.getNF()) * (node.getIS() + node.getNS());
         final double denom = denom1 + denom2;
 
         return enu / denom;
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Cohen.java b/src/main/java/fk/stardust/localizer/sbfl/Cohen.java
index 2232878..1caf343 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Cohen.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Cohen.java
@@ -32,8 +32,8 @@ public double suspiciousness(final INode<T> node) {
         final double enu2 = 2 * node.getNF() * node.getIS();
         final double enu = enu1 - enu2;
 
-        final double denom1 = (node.getIF() + node.getIS()) * (node.getNS() + node.getIS());
-        final double denom2 = (node.getIF() + node.getNF()) * (node.getNF() + node.getNS());
+        final double denom1 = (double) (node.getIF() + node.getIS()) * (node.getNS() + node.getIS());
+        final double denom2 = (double) (node.getIF() + node.getNF()) * (node.getNF() + node.getNS());
         final double denom = denom1 + denom2;
 
         return enu / denom;
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Dice.java b/src/main/java/fk/stardust/localizer/sbfl/Dice.java
index 38e9a0b..fe5e185 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Dice.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Dice.java
@@ -28,7 +28,7 @@ public Dice() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(2.0d * node.getIF()) / new Double(node.getIF() + node.getNF() + node.getIS());
+        return (2.0d * node.getIF()) / (double) (node.getIF() + node.getNF() + node.getIS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Euclid.java b/src/main/java/fk/stardust/localizer/sbfl/Euclid.java
index b85d4a2..b6e4a2f 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Euclid.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Euclid.java
@@ -28,7 +28,7 @@ public Euclid() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return Math.sqrt(new Double(node.getIF() + node.getNS()));
+        return Math.sqrt((double) (node.getIF() + node.getNS()));
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Fleiss.java b/src/main/java/fk/stardust/localizer/sbfl/Fleiss.java
index 6dc176e..fec2e4d 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Fleiss.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Fleiss.java
@@ -37,7 +37,7 @@ public double suspiciousness(final INode<T> node) {
         final double denom2 = 2.0d * node.getNS() + node.getNF() + node.getIS();
         final double denom = denom1 + denom2;
 
-        return enu / denom;
+        return enu / denom; // No new Double() was used here, direct division
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/GeometricMean.java b/src/main/java/fk/stardust/localizer/sbfl/GeometricMean.java
index 95e123b..be8ab59 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/GeometricMean.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/GeometricMean.java
@@ -32,7 +32,7 @@ public double suspiciousness(final INode<T> node) {
         final double denom2 = node.getNS() + node.getNF();
         final double denom3 = node.getIF() + node.getNF();
         final double denom4 = node.getIS() + node.getNS();
-        return new Double(node.getIF() * node.getNS() - node.getNF() * node.getIS())
+        return (double) (node.getIF() * node.getNS() - node.getNF() * node.getIS())
                 / Math.sqrt(denom1 * denom2 * denom3 * denom4);
     }
 
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Goodman.java b/src/main/java/fk/stardust/localizer/sbfl/Goodman.java
index ef38a65..6431b31 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Goodman.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Goodman.java
@@ -28,8 +28,8 @@ public Goodman() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(2.0d * node.getIF() - node.getNF() - node.getIS())
-                / new Double(2.0d * node.getIF() + node.getNF() + node.getIS());
+        return (2.0d * node.getIF() - node.getNF() - node.getIS())
+                / (2.0d * node.getIF() + node.getNF() + node.getIS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Hamann.java b/src/main/java/fk/stardust/localizer/sbfl/Hamann.java
index 21801f4..987f42b 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Hamann.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Hamann.java
@@ -28,8 +28,8 @@ public Hamann() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF() + node.getNS() - node.getNF() - node.getIS())
-                / new Double(node.getIF() + node.getNF() + node.getIS() + node.getNS());
+        return (double) (node.getIF() + node.getNS() - node.getNF() - node.getIS())
+                / (double) (node.getIF() + node.getNF() + node.getIS() + node.getNS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Hamming.java b/src/main/java/fk/stardust/localizer/sbfl/Hamming.java
index 80297f0..100a6c2 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Hamming.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Hamming.java
@@ -28,7 +28,7 @@ public Hamming() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF() + node.getNS());
+        return (double) (node.getIF() + node.getNS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/HarmonicMean.java b/src/main/java/fk/stardust/localizer/sbfl/HarmonicMean.java
index bc43c0a..cf4d778 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/HarmonicMean.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/HarmonicMean.java
@@ -29,8 +29,8 @@ public HarmonicMean() {
     @Override
     public double suspiciousness(final INode<T> node) {
         final double enu1 = node.getIF() * node.getNS() - node.getNF() * node.getIS();
-        final double enu21 = (node.getIF() + node.getIS()) * (node.getNS() + node.getNF());
-        final double enu22 = (node.getIF() + node.getNF()) * (node.getIS() + node.getNS());
+        final double enu21 = (double) (node.getIF() + node.getIS()) * (node.getNS() + node.getNF());
+        final double enu22 = (double) (node.getIF() + node.getNF()) * (node.getIS() + node.getNS());
         final double enu = enu1 * (enu21 + enu22);
 
         final double denom1 = node.getIF() + node.getIS();
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Jaccard.java b/src/main/java/fk/stardust/localizer/sbfl/Jaccard.java
index aed607a..27e904d 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Jaccard.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Jaccard.java
@@ -28,7 +28,7 @@ public Jaccard() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF()) / new Double(node.getIF() + node.getNF() + node.getIS());
+        return (double) node.getIF() / (double) (node.getIF() + node.getNF() + node.getIS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Kulczynski1.java b/src/main/java/fk/stardust/localizer/sbfl/Kulczynski1.java
index 5b925c0..302a361 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Kulczynski1.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Kulczynski1.java
@@ -28,7 +28,7 @@ public Kulczynski1() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF()) / new Double(node.getNF() + node.getIS());
+        return (double) node.getIF() / (double) (node.getNF() + node.getIS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Kulczynski2.java b/src/main/java/fk/stardust/localizer/sbfl/Kulczynski2.java
index 0d31498..acf9800 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Kulczynski2.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Kulczynski2.java
@@ -28,8 +28,8 @@ public Kulczynski2() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        final Double left = new Double(node.getIF()) / new Double(node.getIF() + node.getNF());
-        final Double right = new Double(node.getIF()) / new Double(node.getIF() + node.getIS());
+        final double left = (double) node.getIF() / (double) (node.getIF() + node.getNF());
+        final double right = (double) node.getIF() / (double) (node.getIF() + node.getIS());
         return 0.5d * (left + right);
     }
 
diff --git a/src/main/java/fk/stardust/localizer/sbfl/M1.java b/src/main/java/fk/stardust/localizer/sbfl/M1.java
index d711fe3..ed1f552 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/M1.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/M1.java
@@ -28,7 +28,7 @@ public M1() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF() + node.getNS()) / new Double(node.getNF() + node.getIS());
+        return (double) (node.getIF() + node.getNS()) / (double) (node.getNF() + node.getIS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/M2.java b/src/main/java/fk/stardust/localizer/sbfl/M2.java
index 3d875ff..8b7831a 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/M2.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/M2.java
@@ -28,8 +28,8 @@ public M2() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF())
-                / new Double(node.getIF() + node.getNS() + 2.0d * (node.getNF() + node.getIS()));
+        return (double) node.getIF()
+                / (double) (node.getIF() + node.getNS() + 2.0d * (node.getNF() + node.getIS()));
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Ochiai.java b/src/main/java/fk/stardust/localizer/sbfl/Ochiai.java
index f5cc782..1b984f8 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Ochiai.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Ochiai.java
@@ -28,8 +28,8 @@ public Ochiai() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF())
-                / Math.sqrt(new Double((node.getIF() + node.getNF()) * (node.getIF() + node.getIS())));
+        return (double) node.getIF()
+                / Math.sqrt((double) ((node.getIF() + node.getNF()) * (node.getIF() + node.getIS())));
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Ochiai2.java b/src/main/java/fk/stardust/localizer/sbfl/Ochiai2.java
index b6c84d3..e1ccbe7 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Ochiai2.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Ochiai2.java
@@ -32,7 +32,7 @@ public double suspiciousness(final INode<T> node) {
         final double denom2 = node.getNS() + node.getNF();
         final double denom3 = node.getIF() + node.getNF();
         final double denom4 = node.getIS() + node.getNS();
-        return new Double(node.getIF() * node.getNS()) / Math.sqrt(denom1 * denom2 * denom3 * denom4);
+        return (double) (node.getIF() * node.getNS()) / Math.sqrt(denom1 * denom2 * denom3 * denom4);
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Overlap.java b/src/main/java/fk/stardust/localizer/sbfl/Overlap.java
index 7b69c1a..0c40592 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Overlap.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Overlap.java
@@ -28,7 +28,7 @@ public Overlap() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF()) / new Double(Math.min(node.getIF(), Math.min(node.getNF(), node.getIS())));
+        return (double) node.getIF() / (double) (Math.min(node.getIF(), Math.min(node.getNF(), node.getIS())));
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/RogersTanimoto.java b/src/main/java/fk/stardust/localizer/sbfl/RogersTanimoto.java
index 14273fc..6771ae8 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/RogersTanimoto.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/RogersTanimoto.java
@@ -28,8 +28,8 @@ public RogersTanimoto() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF() + node.getNS())
-                / new Double(node.getIF() + node.getNS() + 2.0d * (node.getNF() + node.getIS()));
+        return (double) (node.getIF() + node.getNS())
+                / (double) (node.getIF() + node.getNS() + 2.0d * (node.getNF() + node.getIS()));
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Rogot1.java b/src/main/java/fk/stardust/localizer/sbfl/Rogot1.java
index 93b65d3..1593ba5 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Rogot1.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Rogot1.java
@@ -28,8 +28,8 @@ public Rogot1() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        final double left = new Double(node.getIF()) / new Double(2.0d * node.getIF() + node.getNF() + node.getIS());
-        final double right = new Double(node.getNS()) / new Double(2.0d * node.getNS() + node.getNF() + node.getIS());
+        final double left = (double) node.getIF() / (double) (2.0d * node.getIF() + node.getNF() + node.getIS());
+        final double right = (double) node.getNS() / (double) (2.0d * node.getNS() + node.getNF() + node.getIS());
         return 0.5d * (left + right);
     }
 
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Rogot2.java b/src/main/java/fk/stardust/localizer/sbfl/Rogot2.java
index d1f4367..7844f7a 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Rogot2.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Rogot2.java
@@ -28,10 +28,10 @@ public Rogot2() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        final double frac1 = new Double(node.getIF()) / new Double(node.getIF() + node.getIS());
-        final double frac2 = new Double(node.getIF()) / new Double(node.getIF() + node.getNF());
-        final double frac3 = new Double(node.getNS()) / new Double(node.getNS() + node.getIS());
-        final double frac4 = new Double(node.getNS()) / new Double(node.getNS() + node.getNF());
+        final double frac1 = (double) node.getIF() / (double) (node.getIF() + node.getIS());
+        final double frac2 = (double) node.getIF() / (double) (node.getIF() + node.getNF());
+        final double frac3 = (double) node.getNS() / (double) (node.getNS() + node.getIS());
+        final double frac4 = (double) node.getNS() / (double) (node.getNS() + node.getNF());
         return 0.25d * (frac1 + frac2 + frac3 + frac4);
     }
 
diff --git a/src/main/java/fk/stardust/localizer/sbfl/RussellRao.java b/src/main/java/fk/stardust/localizer/sbfl/RussellRao.java
index 0e0499a..ee19831 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/RussellRao.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/RussellRao.java
@@ -28,7 +28,7 @@ public RussellRao() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF()) / new Double(node.getIF() + node.getNF() + node.getIS() + node.getNS());
+        return (double) node.getIF() / (double) (node.getIF() + node.getNF() + node.getIS() + node.getNS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Scott.java b/src/main/java/fk/stardust/localizer/sbfl/Scott.java
index 36fa52d..6f171b7 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Scott.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Scott.java
@@ -37,7 +37,7 @@ public double suspiciousness(final INode<T> node) {
         final double denom2 = 2.0d * node.getNS() + node.getNF() + node.getIS();
         final double denom = denom1 * denom2;
 
-        return enu / denom;
+        return enu / denom; // No new Double() was used here
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/SimpleMatching.java b/src/main/java/fk/stardust/localizer/sbfl/SimpleMatching.java
index 9efacc8..92f5d6a 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/SimpleMatching.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/SimpleMatching.java
@@ -28,8 +28,8 @@ public SimpleMatching() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(node.getIF() + node.getNS())
-                / new Double(node.getIF() + node.getNF() + node.getIS() + node.getNS());
+        return (double) (node.getIF() + node.getNS())
+                / (double) (node.getIF() + node.getNF() + node.getIS() + node.getNS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Sokal.java b/src/main/java/fk/stardust/localizer/sbfl/Sokal.java
index da26d75..b6fdecc 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Sokal.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Sokal.java
@@ -28,8 +28,8 @@ public Sokal() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(2.0d * (node.getIF() + node.getNS()))
-                / new Double(2.0d * (node.getIF() + node.getNS()) + node.getNF() + node.getIS());
+        return (2.0d * (node.getIF() + node.getNS()))
+                / (2.0d * (node.getIF() + node.getNS()) + node.getNF() + node.getIS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/SorensenDice.java b/src/main/java/fk/stardust/localizer/sbfl/SorensenDice.java
index fbcff74..81ab3ee 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/SorensenDice.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/SorensenDice.java
@@ -30,7 +30,7 @@ public SorensenDice() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return new Double(2.0d * node.getIF()) / new Double(2.0d * node.getIF() + node.getNF() + node.getIS());
+        return (2.0d * node.getIF()) / (2.0d * node.getIF() + node.getNF() + node.getIS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Tarantula.java b/src/main/java/fk/stardust/localizer/sbfl/Tarantula.java
index 2da380a..2f00888 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Tarantula.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Tarantula.java
@@ -28,8 +28,8 @@ public Tarantula() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        final double part = new Double(node.getIF()) / new Double(node.getIF() + node.getNF());
-        return part / new Double(part + node.getIS() / new Double(node.getIS() + node.getNS()));
+        final double part = (double) node.getIF() / (double) (node.getIF() + node.getNF());
+        return part / (part + (double) node.getIS() / (double) (node.getIS() + node.getNS()));
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Wong1.java b/src/main/java/fk/stardust/localizer/sbfl/Wong1.java
index ebcacd3..45bd11f 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Wong1.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Wong1.java
@@ -28,7 +28,7 @@ public Wong1() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return node.getIF();
+        return (double) node.getIF();
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Wong2.java b/src/main/java/fk/stardust/localizer/sbfl/Wong2.java
index 7c346d4..259bdea 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Wong2.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Wong2.java
@@ -28,7 +28,7 @@ public Wong2() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        return node.getIF() - node.getIS();
+        return (double) (node.getIF() - node.getIS());
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Wong3.java b/src/main/java/fk/stardust/localizer/sbfl/Wong3.java
index 23370fd..b3872bc 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Wong3.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Wong3.java
@@ -29,7 +29,7 @@ public Wong3() {
     @Override
     public double suspiciousness(final INode<T> node) {
         if (node.getIS() <= 2) {
-            return node.getIS();
+            return (double) node.getIS(); // Cast to double for consistency, though int would auto-widen
         } else if (node.getIS() <= 10) {
             return 2.0d + 0.1d * (node.getIS() - 2.0d);
         } else {
diff --git a/src/main/java/fk/stardust/localizer/sbfl/Zoltar.java b/src/main/java/fk/stardust/localizer/sbfl/Zoltar.java
index 8ba8ebe..c7d23c1 100644
--- a/src/main/java/fk/stardust/localizer/sbfl/Zoltar.java
+++ b/src/main/java/fk/stardust/localizer/sbfl/Zoltar.java
@@ -28,8 +28,8 @@ public Zoltar() {
 
     @Override
     public double suspiciousness(final INode<T> node) {
-        final double denomPart = new Double(10000d * node.getNF() * node.getIS()) / new Double(node.getIF());
-        return new Double(node.getIF()) / new Double(node.getIF() + node.getNF() + node.getIS() + denomPart);
+        final double denomPart = (10000d * node.getNF() * node.getIS()) / (double) node.getIF();
+        return (double) node.getIF() / (double) (node.getIF() + node.getNF() + node.getIS() + denomPart);
     }
 
     @Override
diff --git a/src/main/java/fk/stardust/provider/CoberturaProvider.java b/src/main/java/fk/stardust/provider/CoberturaProvider.java
index f1b3f3d..21aa93f 100644
--- a/src/main/java/fk/stardust/provider/CoberturaProvider.java
+++ b/src/main/java/fk/stardust/provider/CoberturaProvider.java
@@ -15,10 +15,10 @@
 import java.util.HashMap;
 import java.util.Map;
 
-import org.jdom.Document;
-import org.jdom.Element;
-import org.jdom.JDOMException;
-import org.jdom.input.SAXBuilder;
+import org.jdom2.Document;
+import org.jdom2.Element;
+import org.jdom2.JDOMException;
+import org.jdom2.input.SAXBuilder;
 
 import fk.stardust.traces.HierarchicalSpectra;
 import fk.stardust.traces.ISpectra;
@@ -118,18 +118,17 @@ private void loadSingleTrace(final String file, final boolean successful, final
             final HierarchicalSpectra<String, String> classSpectra,
             final HierarchicalSpectra<String, String> packageSpectra) throws JDOMException, IOException {
         final IMutableTrace<String> trace = lineSpectra.addTrace(successful);
-        final Document doc = new SAXBuilder().build(file);
+        final SAXBuilder saxBuilder = new SAXBuilder();
+        final Document doc = saxBuilder.build(file);
         final boolean createHierarchicalSpectra = methodSpectra != null && classSpectra != null
                 && packageSpectra != null;
 
         // loop over all packages of the trace file
-        for (final Object pckgObj : doc.getRootElement().getChild("packages").getChildren()) {
-            final Element pckg = (Element) pckgObj;
+        for (final Element pckg : doc.getRootElement().getChild("packages").getChildren()) {
             final String packageName = pckg.getAttributeValue("name");
 
             // loop over all classes of the package
-            for (final Object clssObj : pckg.getChild("classes").getChildren()) {
-                final Element clss = (Element) clssObj;
+            for (final Element clss : pckg.getChild("classes").getChildren()) {
                 final String className = clss.getAttributeValue("filename");
 
                 // if necessary, create hierarchical spectra
@@ -138,8 +137,7 @@ private void loadSingleTrace(final String file, final boolean successful, final
                 }
 
                 // loop over all methods of the class
-                for (final Object mthdObj : clss.getChild("methods").getChildren()) {
-                    final Element method = (Element) mthdObj;
+                for (final Element method : clss.getChild("methods").getChildren()) {
                     final String methodName = method.getAttributeValue("name") + method.getAttributeValue("signature");
                     final String methodIdentifier = String.format("%s:%s", className, methodName);
 
@@ -149,8 +147,7 @@ private void loadSingleTrace(final String file, final boolean successful, final
                     }
 
                     // loop over all lines of the method
-                    for (final Object lineObj : method.getChild("lines").getChildren()) {
-                        final Element line = (Element) lineObj;
+                    for (final Element line : method.getChild("lines").getChildren()) {
 
                         // set node involvement
                         final String lineIdentifier = createNodeIdentifier(className, line.getAttributeValue("number"));
diff --git a/src/main/java/fk/stardust/traces/HierarchicalSpectra.java b/src/main/java/fk/stardust/traces/HierarchicalSpectra.java
index 75ec27c..cf1c688 100644
--- a/src/main/java/fk/stardust/traces/HierarchicalSpectra.java
+++ b/src/main/java/fk/stardust/traces/HierarchicalSpectra.java
@@ -80,7 +80,7 @@ public void setParent(final INode<P> parentNode, final INode<C> childNode) {
      */
     private Set<INode<C>> childrenOf(final INode<P> parent) {
         if (!this.relation.containsKey(parent)) {
-            this.relation.put(parent, new HashSet<INode<C>>());
+            this.relation.put(parent, new HashSet<>());
         }
         return this.relation.get(parent);
     }
diff --git a/src/main/java/fk/stardust/traces/Spectra.java b/src/main/java/fk/stardust/traces/Spectra.java
index a9245fd..e5d3b69 100644
--- a/src/main/java/fk/stardust/traces/Spectra.java
+++ b/src/main/java/fk/stardust/traces/Spectra.java
@@ -87,7 +87,7 @@ public boolean hasNode(final T identifier) {
      */
     @Override
     public List<ITrace<T>> getTraces() {
-        return new ArrayList<ITrace<T>>(this.traces);
+        return new ArrayList<>(this.traces);
     }
 
     /**
diff --git a/src/main/java/fk/stardust/util/CsvUtils.java b/src/main/java/fk/stardust/util/CsvUtils.java
index 0ea1d84..44183c8 100644
--- a/src/main/java/fk/stardust/util/CsvUtils.java
+++ b/src/main/java/fk/stardust/util/CsvUtils.java
@@ -39,7 +39,7 @@ private CsvUtils() {
      * @return the combined CSV string without trailing newline
      */
     public static String toCsvLine(final String[] parts) {
-        final StringBuffer line = new StringBuffer("");
+        final StringBuilder line = new StringBuilder("");
         for (final String part : parts) {
             if (line.length() > 0) {
                 line.append(CSV_DELIMITER);
diff --git a/src/test/java/fk/stardust/evaluation/ibugs/IBugsFaultLocationsTest.java b/src/test/java/fk/stardust/evaluation/ibugs/IBugsFaultLocationsTest.java
index 2f5f92e..c394114 100644
--- a/src/test/java/fk/stardust/evaluation/ibugs/IBugsFaultLocationsTest.java
+++ b/src/test/java/fk/stardust/evaluation/ibugs/IBugsFaultLocationsTest.java
@@ -11,9 +11,8 @@
 
 import java.io.IOException;
 
-import junit.framework.Assert;
-
-import org.jdom.JDOMException;
+import org.testng.Assert;
+import org.jdom2.JDOMException;
 import org.testng.annotations.AfterMethod;
 import org.testng.annotations.BeforeMethod;
 import org.testng.annotations.Test;
diff --git a/src/test/java/fk/stardust/localizer/NormalizedRankingTest.java b/src/test/java/fk/stardust/localizer/NormalizedRankingTest.java
index d5f5dc0..e8064ec 100644
--- a/src/test/java/fk/stardust/localizer/NormalizedRankingTest.java
+++ b/src/test/java/fk/stardust/localizer/NormalizedRankingTest.java
@@ -9,8 +9,7 @@
 
 package fk.stardust.localizer;
 
-import junit.framework.Assert;
-
+import org.testng.Assert;
 import org.testng.annotations.AfterMethod;
 import org.testng.annotations.BeforeMethod;
 import org.testng.annotations.Test;
diff --git a/src/test/java/fk/stardust/util/FileUtilsTest.java b/src/test/java/fk/stardust/util/FileUtilsTest.java
index 53eb9c8..635b16b 100644
--- a/src/test/java/fk/stardust/util/FileUtilsTest.java
+++ b/src/test/java/fk/stardust/util/FileUtilsTest.java
@@ -9,8 +9,7 @@
 
 package fk.stardust.util;
 
-import junit.framework.Assert;
-
+import org.testng.Assert;
 import org.testng.annotations.Test;
 
 public class FileUtilsTest {
diff --git a/testng.xml b/src/test/resources/testng.xml
similarity index 100%
rename from testng.xml
rename to src/test/resources/testng.xml