Bug 280964 [CommonNavigator] Confusing javadocs in CommonNavigator
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonNavigator.java
.getSaveablesService().init(this, getCommonViewer(),
						saveablesLifecycleListener);
		
		commonViewer.addSelectionChangedListener(new ISelectionChangedListener() {
			public void selectionChanged(SelectionChangedEvent event) {
				firePropertyChange(PROP_DIRTY);
			}});
		
		String helpContext = commonViewer.getNavigatorContentService().getViewerDescriptor().getHelpContext();
		if (helpContext == null)
			helpContext = HELP_CONTEXT;
		PlatformUI.getWorkbench().getHelpSystem().setHelp(commonViewer.getControl(), helpContext);
		
		stats.endRun();
	}
	/**
	 * <p>
	 * Updates the title text and title tool tip. Called whenever the input of
	 * the viewer changes.
	 * </p>
	 * @since 3.4
	 */
	public void updateTitle() {
		Object input = commonViewer.getInput();
		if (input == null) {
			setTitleToolTip(""); 
		} else {
			String inputToolTip = getFrameToolTipText(input);
			setTitleToolTip(inputToolTip);
		}