Bug 299209 [CommonNavigator] Clean up error reporting for pipelined extensions
A catch block was missing for one of them, and the error report does not provide the extension Id that had the problem.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorPipelineService.java
private void pipelineInterceptRemove(PipelinedShapeModification aRemoveModification, ContributorTrackingSet trackedSet, NavigatorContentExtension overrideableExtension) {
		
		
		try {
			NavigatorContentExtension overridingExtension = null;
			Set overridingExtensions = new LinkedHashSet();
			for (Iterator iter = trackedSet.iterator(); iter.hasNext();) {
				Object element = (Object) iter.next();
				if(element instanceof TreePath) {
					overridingExtensions.addAll(Arrays.asList(overrideableExtension.getOverridingExtensionsForPossibleChild(((TreePath)element).getLastSegment())));
				} else {
					overridingExtensions.addAll(Arrays.asList(overrideableExtension.getOverridingExtensionsForPossibleChild(element)));
				}
			}
			 
			for (Iterator extensionsItr = overridingExtensions.iterator(); extensionsItr.hasNext();) {
				overridingExtension = (NavigatorContentExtension) extensionsItr.next();
				trackedSet.setContributor((NavigatorContentDescriptor) overridingExtension.getDescriptor());
				if (overridingExtension.getContentProvider() instanceof IPipelinedTreeContentProvider) {
					((IPipelinedTreeContentProvider) overridingExtension.getContentProvider()).interceptRemove(aRemoveModification);
				}
				trackedSet.setContributor(null);
				if(overridingExtension.getDescriptor().hasOverridingExtensions())
					pipelineInterceptRemove(aRemoveModification, trackedSet, overridingExtension);
												
			}
			
		} catch (Throwable e) {
			String msg = e.getMessage() != null ? e.getMessage()  : e.toString();