fDocument.addDocumentListener(this);
		public OccurrencesFinderJob(IDocument document, Position[] positions, ISelection selection) {			super(JavaEditorMessages.getString("JavaEditor.markOccurrences.job.name")); //$NON-NLS-1$			fDocument= document;			fSelection= selection;			fPositions= positions;			fDocument.addDocumentListener(this);						if (getSelectionProvider() instanceof ISelectionValidator)				fPostSelectionValidator= (ISelectionValidator)getSelectionProvider(); 		}