Some minor modifications for PMD.

Kieker.WebGUI/src/main/java/kieker/webgui/beans/session/UserBean.java

@@ -45,20 +45,21 @@ public final class UserBean implements Serializable {
 	 * This field contains the name of the user.
 	 */
 	private final String userName;
-
-	private static final AtomicLong guestCounter = new AtomicLong();
+	/**
+	 * The counter to get a number for the current user and to differ the sessions in test purposes.
+	 */
+	private static final AtomicLong GUEST_COUNTER = new AtomicLong();
 
 	/**
 	 * Creates a new instance of this class. The user name is set to "Guest".
 	 */
 	public UserBean() {
-		this.userName = "Guest #" + UserBean.guestCounter.getAndIncrement();
+		this.userName = "Guest #" + UserBean.GUEST_COUNTER.getAndIncrement();
 	}
 
-	@Override
 	@PreDestroy
-	protected void finalize() {
-		UserBean.guestCounter.decrementAndGet();
+	protected void destroy() {
+		UserBean.GUEST_COUNTER.decrementAndGet();
 	}
 
 	/**

Kieker.WebGUI/src/main/java/kieker/webgui/common/ACManager.java

@@ -447,7 +447,7 @@ public final class ACManager {
 							ACManager.LOG.error("An error occured while updating the display.", ex);
 						} catch (final InvocationTargetException ex) {
 							ACManager.LOG.error("An error occured while updating the display.", ex);
-						} catch (final NullPointerException ex) {
+						} catch (final NullPointerException ex) { // NOPMD
 							ACManager.LOG.error("An error occured while updating the display.", ex);
 						}
 					}