public void partOpened(IWorkbenchPart part) {
		if (part instanceof IEditorPart) {
			IEditorInput editorInput = ((IEditorPart) part).getEditorInput();
			if (editorInput instanceof IFileEditorInput) {
				IFile file = ((IFileEditorInput) editorInput).getFile();
				if (file.getName().endsWith(".xml")) { // replace this with desired condition
					System.out.println("Xml file openend ");// call xy method here
				}
			}
		}
	}