Allow CodeGenerationException to have a cause

src/main/java/de/hhu/stups/codegenerator/CodeGenerator.java

@@ -344,8 +344,7 @@ public class CodeGenerator {
 		try {
 			project = Antlr4BParser.createBProjectFromMainMachineFile(path.toFile());
 		} catch (TypeErrorException | ScopeException e) {
-			e.printStackTrace();
-			throw new CodeGenerationException(e.getMessage());
+			throw new CodeGenerationException(e);
 		}
 		return project;
 	}
@@ -355,8 +354,7 @@ public class CodeGenerator {
 		try {
 			project = VisBProjectParser.createVisBProjectFromMainFile(path.toFile(), visualisation);
 		} catch (TypeErrorException | ScopeException e) {
-			e.printStackTrace();
-			throw new CodeGenerationException(e.getMessage());
+			throw new CodeGenerationException(e);
 		}
 		return project;
 	}

src/main/java/de/hhu/stups/codegenerator/generators/CodeGenerationException.java

@@ -4,9 +4,15 @@ package de.hhu.stups.codegenerator.generators;
  * Created by fabian on 31.05.18.
  */
 public class CodeGenerationException extends RuntimeException {
+    public CodeGenerationException(String message, Throwable cause) {
+        super(message, cause);
+    }
 
-    public CodeGenerationException(String msg) {
-        super(msg);
+    public CodeGenerationException(String message) {
+        this(message, null);
     }
 
+    public CodeGenerationException(Throwable cause) {
+        this(cause.getMessage(), cause);
+    }
 }