Bug 224571 [Decorators] Missing problem markers on IFile in Package Explorer
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/ContentTypeDecorator.java
IContentDescription contentDescription = null;
		try {
			contentDescription = file.getContentDescription();
		} catch (CoreException e) {
			
			
		}
		if (contentDescription != null) {
			IContentType contentType = contentDescription.getContentType();
			if (contentType != null) {
				ImageDescriptor image = PlatformUI.getWorkbench()
						.getEditorRegistry().getImageDescriptor(file.getName(),
								contentType);
				if (image != null) {
					decoration.addOverlay(image);
				}
			}
		}
	}
	public void addListener(ILabelProviderListener listener) {
	}
	public void dispose() {
	}
	public boolean isLabelProperty(Object element, String property) {
		return false;
	}
	public void removeListener(ILabelProviderListener listener) {
	}
}