Bug 28582 Quickfix icon hides the error icon in editor left ruler [quick fix]
Build 20021216 In presence of problems, one cannot see an error icon in the left ruler, since it get overlapped completely with the quickfix icon. The only error indication is the underlining in the code itself.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitDocumentProvider.java
IFileEditorInput input= (IFileEditorInput) element;
		return new CompilationUnitAnnotationModel(input);
	}
	
	protected void initializeDocument(IDocument document) {
		if (document != null) {
			JavaTextTools tools= JavaPlugin.getDefault().getJavaTextTools();
			IDocumentPartitioner partitioner= tools.createDocumentPartitioner();
			document.setDocumentPartitioner(partitioner);
			partitioner.connect(document);
		}
	}
	
	/*
	 * @see AbstractDocumentProvider#createDocument(Object)
	 */
	protected IDocument createDocument(Object element) throws CoreException {
		
		if (element instanceof IEditorInput) {
			Document document= new PartiallySynchronizedDocument();
			if (setDocumentContent(document, (IEditorInput) element, getEncoding(element))) {
		initializeDocument(document);
		return document;
	}
		}
	
		return null;
	}
	
	/*