private void activateHandlers() {
IHandlerService handlerService = (IHandlerService)getSite().getService(IHandlerService.class);
IHandler rebuildCAD = new RebuildCADHandler();
handlerService.activateHandler("com.gstaykov.pscoder.rebuildcad", rebuildCAD);
IHandler commentHandler = new CommentHandler();
handlerService.activateHandler("com.gstaykov.pscoder.addcomment", commentHandler);
IHandler goToDefinitionHandler = new GoToDefinitionHandler();
handlerService.activateHandler("com.gstaykov.pscoder.gotodefinition", goToDefinitionHandler);