Index: /trunk/JFCMonitor/src/de/ugoe/cs/eventbench/jfcmonitor/JarLauncher.java
===================================================================
--- /trunk/JFCMonitor/src/de/ugoe/cs/eventbench/jfcmonitor/JarLauncher.java	(revision 263)
+++ /trunk/JFCMonitor/src/de/ugoe/cs/eventbench/jfcmonitor/JarLauncher.java	(revision 264)
@@ -12,15 +12,32 @@
 import java.util.jar.Manifest;
 
-// TODO decent exception handling; currently no exception are caught!
 public class JarLauncher {
-	
+
 	String workingDir = System.getProperty("user.dir") + "/";
 	String jarfile;
 	String[] args;
-	
-	String[] classPath = new String[]{};
+
+	String[] classPath = new String[] {};
 	String mainClassName = "";
 	ClassLoader costumClassLoader;
-	
+
+	public class JarLaunchException extends Exception {
+
+		private static final long serialVersionUID = 1L;
+
+		public JarLaunchException() {
+			super();
+		}
+
+		public JarLaunchException(String string) {
+			super(string);
+		}
+
+		public JarLaunchException(Exception e) {
+			super(e);
+		}
+
+	}
+
 	public JarLauncher(String jarfile, String[] args) {
 		this.jarfile = jarfile;
@@ -28,39 +45,98 @@
 	}
 
-	public void exec() throws FileNotFoundException, IOException, ClassNotFoundException, SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException, InterruptedException {
-		getInfoFromJar();
-		initClassLoader();
-		startSUT();
+	public void exec() {
+		try {
+			getInfoFromJar();
+			initClassLoader();
+			startSUT();
+		} catch (JarLaunchException e) {
+			System.err.println("Failure to launch application.");
+			System.err.println(e.getMessage());
+		}
 	}
-	
-	private void getInfoFromJar() throws FileNotFoundException, IOException {
-		JarInputStream jarInputStream = new JarInputStream(new FileInputStream(workingDir+jarfile));
+
+	private void getInfoFromJar() throws JarLaunchException {
+		JarInputStream jarInputStream;
+		try {
+			jarInputStream = new JarInputStream(new FileInputStream(workingDir
+					+ jarfile));
+		} catch (FileNotFoundException e) {
+			throw new JarLaunchException(e);
+		} catch (IOException e) {
+			throw new JarLaunchException(e);
+		}
 		Manifest manifest = jarInputStream.getManifest();
 		mainClassName = manifest.getMainAttributes().getValue("Main-Class");
-		String jarClassPath = manifest.getMainAttributes().getValue("Class-Path");
+		String jarClassPath = manifest.getMainAttributes().getValue(
+				"Class-Path");
 		String[] jarClassPathElements = jarClassPath.split(" ");
 		classPath = new String[jarClassPathElements.length];
-		for (int i=0; i<jarClassPathElements.length ; i++) {
-			classPath[i] = "file:"+workingDir+jarClassPathElements[i];
+		for (int i = 0; i < jarClassPathElements.length; i++) {
+			classPath[i] = "file:" + workingDir + jarClassPathElements[i];
 		}
 	}
-	
-	private void initClassLoader() throws MalformedURLException, SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException {
+
+	private void initClassLoader() throws JarLaunchException {
 		URLClassLoader classLoader = (URLClassLoader) ClassLoader
 				.getSystemClassLoader();
-		Method method= URLClassLoader.class.getDeclaredMethod("addURL", new Class[] { URL.class });
+		Method method;
+		try {
+			method = URLClassLoader.class.getDeclaredMethod("addURL",
+					new Class[] { URL.class });
+		} catch (SecurityException e) {
+			throw new JarLaunchException(
+					"addURL method of URLClassLoader not accessible via reflection.");
+		} catch (NoSuchMethodException e) {
+			throw new JarLaunchException(
+					"URLClassLoader does not have addURL method. Should be impossible!!");
+		}
 		method.setAccessible(true);
-		
-		method.invoke(classLoader, new Object[]{new URL("file:"+workingDir+jarfile)});
-		
-		for (String element : classPath) {
-			method.invoke(classLoader, new Object[]{new URL(element)});
+
+		try {
+			method.invoke(classLoader, new Object[] { new URL("file:"
+					+ workingDir + jarfile) });
+			for (String element : classPath) {
+				method.invoke(classLoader, new Object[] { new URL(element) });
+			}
+		} catch (IllegalArgumentException e) {
+			throw new JarLaunchException(
+					"Illegal arguments for addURL method. Should be impossible!!");
+		} catch (MalformedURLException e) {
+			throw new JarLaunchException(e);
+		} catch (IllegalAccessException e) {
+			throw new JarLaunchException(
+					"addURL method of URLClassLoader not accessible via reflection.");
+		} catch (InvocationTargetException e) {
+			e.printStackTrace();
 		}
 	}
-	
-	private void startSUT() throws ClassNotFoundException, SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException, InterruptedException {
-		Class<?> mainClass = Class.forName(mainClassName);
-		Method mainMethod = mainClass.getMethod("main", new Class[]{String[].class});
-		mainMethod.invoke(null, new Object[]{args});
+
+	private void startSUT() throws JarLaunchException {
+		Class<?> mainClass;
+		try {
+			mainClass = Class.forName(mainClassName);
+		} catch (ClassNotFoundException e) {
+			throw new JarLaunchException("Main class not found: "
+					+ mainClassName);
+		}
+		Method mainMethod;
+		try {
+			mainMethod = mainClass.getMethod("main",
+					new Class[] { String[].class });
+		} catch (SecurityException e) {
+			throw new JarLaunchException("Main method not accessible.");
+		} catch (NoSuchMethodException e) {
+			throw new JarLaunchException("Main method not found.");
+		}
+		try {
+			mainMethod.invoke(null, new Object[] { args });
+		} catch (IllegalArgumentException e) {
+			throw new JarLaunchException(
+					"Illegal arguments for main method. Should be impossible!!");
+		} catch (IllegalAccessException e) {
+			throw new JarLaunchException("Main method not accessible.");
+		} catch (InvocationTargetException e) {
+			throw new JarLaunchException(e);
+		}
 	}
 }