private IExecutionListener listener = new IExecutionListener() {
		
		@Override
		public void postExecuteSuccess(String commandId, Object returnValue) {
			System.out.println(commandId);
}
		
	};
	
	public void setWorkbench(IWorkbench workbench) {	
		getCommandService(workbench).addExecutionListener(listener);
	}

	public void unsetWorkbench(IWorkbench workbench) {
		getCommandService(workbench).removeExecutionListener(listener);
	}
	
	private ICommandService getCommandService(IWorkbench workbench) {
		return (ICommandService)workbench.getAdapter(ICommandService.class);
	}