getWorkbench().getActiveWorkbenchWindow().addPageListener(new PackageExplorerDoubleClickHandler());
PackageExplorerDoubleClickHandler doubleClickHandler = new PackageExplorerDoubleClickHandler(); getWorkbench().getActiveWorkbenchWindow().addPageListener(doubleClickHandler);
	public void start(BundleContext _context) throws Exception {		super.start(_context);		getWorkbench().getActiveWorkbenchWindow().addPageListener(new PackageExplorerDoubleClickHandler());	}