Bug 275678 [Dialogs][EditorMgmt] Revert usage of new openEditors API
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/handlers/OpenResourceHandler.java
IWorkbenchWindowActionDelegate {
	/**
	 * The identifier of the parameter storing the file path.
	 */
	private static final String PARAM_ID_FILE_PATH = "filePath"; 
	/**
	 * A collection of objects listening to changes to this manager. This
	 * collection is <code>null</code> if there are no listeners.
	 */
	private transient ListenerList listenerList = null;
	/**
	 * Creates a new instance of the class.
	 */
	public OpenResourceHandler() {
		super();
		PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
				IIDEHelpContextIds.OPEN_WORKSPACE_FILE_ACTION);
	}
	public final void addHandlerListener(final IHandlerListener listener) {
		if (listenerList == null) {
			listenerList = new ListenerList(ListenerList.IDENTITY);
		}
		listenerList.add(listener);
	}
	public final void dispose() {