EDIT: Some smaller improvements for code style.

src/main/java/eme/extractor/DataTypeExtractor.java

@@ -139,9 +139,8 @@ public Set<String> getDataTypes() {
     }
 
     /**
-     * Extracts bounds for an {@link ExtractedTypeParameter} from an array of bound
-     * signatures. Needs an declaring type, which is the {@link IType} itself or the declaring type of an
-     * {@link IMethod}.
+     * Extracts bounds for an {@link ExtractedTypeParameter} from an array of bound signatures. Needs an declaring type,
+     * which is the {@link IType} itself or the declaring type of an {@link IMethod}.
      */
     private void extractBounds(ExtractedTypeParameter parameter, String[] signatures, IType declaringType) throws JavaModelException {
         for (String bound : signatures) { // if has bound:

src/main/java/eme/extractor/JavaTypeExtractor.java

@@ -92,11 +92,24 @@ public ExtractedType extractType(IType type) throws JavaModelException {
         return extractedType;
     }
 
+    /**
+     * Checks whether an {@link IType} inherits from the class {@link java.lang.Throwable}
+     */
+    private boolean extendsThrowable(IType type) throws JavaModelException {
+        ITypeHierarchy hierarchy = type.newSupertypeHierarchy(new NullProgressMonitor()); // get super type hierarchy
+        for (IType superType : hierarchy.getAllSuperclasses(type)) { // for every super type
+            if (Throwable.class.getName().equals(superType.getFullyQualifiedName())) { // if is called throwable
+                return true; // is true
+            }
+        }
+        return false; // is false
+    }
+
     /**
      * Parses an {@link IType} that has been identified as class.
      */
     private ExtractedClass extractClass(IType type) throws JavaModelException {
-        boolean throwable = inheritsFromThrowable(type);
+        boolean throwable = extendsThrowable(type);
         ExtractedClass newClass = new ExtractedClass(getName(type), isAbstract(type), throwable);
         String signature = type.getSuperclassTypeSignature();
         if (signature != null) { // get full super type:
@@ -136,17 +149,4 @@ private void extractOuterType(IType type, ExtractedType extractedType) {
             extractedType.setOuterType(getName(outerType)); // add outer type name
         }
     }
-
-    /**
-     * Checks whether an {@link IType} inherits from the class {@link java.lang.Throwable}
-     */
-    private boolean inheritsFromThrowable(IType type) throws JavaModelException {
-        ITypeHierarchy hierarchy = type.newSupertypeHierarchy(new NullProgressMonitor()); // get super type hierarchy
-        for (IType superType : hierarchy.getAllSuperclasses(type)) { // for every super type
-            if ("java.lang.Throwable".equals(superType.getFullyQualifiedName())) { // if is called throwable
-                return true; // is true
-            }
-        }
-        return false; // is false
-    }
 }

src/main/java/eme/model/datatypes/ExtractedField.java

@@ -9,7 +9,6 @@
 public class ExtractedField extends ExtractedVariable {
     private boolean finalAttribute;
     private AccessLevelModifier modifier;
-
     private boolean staticAttribute;
 
     /**