Example
protected void finalize() throws Throwable {
try {
PropertyChangeListener listener = getListener();
listener.propertyChange(new PropertyChangeEvent(this , "resources", "", null));
} finally {
super .finalize();
}
}

private PropertyChangeListener getListener() {
return _listener;
}

private transient PropertyChangeListener _listener = null;
Solution
Use a cleanup method that is explicitly invoked instead of the finalize() method.
protected void cleanupNotify() throws Throwable {
PropertyChangeListener listener = getListener();
listener.propertyChange(new PropertyChangeEvent(this , "resources", "", null));
}

private PropertyChangeListener getListener() {
return _listener;
}

private transient PropertyChangeListener _listener = null;