Bug 123496 [IDE] Use operation validation API for IDE actions
We should use the Resources/Core operation validation API in the IDE actions for manipulating resources.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/IDE.java
*/
	public static IEditorDescriptor getEditorDescriptor(String name, boolean inferContentType)
			throws PartInitException {
		if (name == null) {
			throw new IllegalArgumentException();
		}
		IContentType contentType = inferContentType ? Platform
				.getContentTypeManager().findContentTypeFor(name) : null;
		IEditorRegistry editorReg = PlatformUI.getWorkbench()
				.getEditorRegistry();
		return getEditorDescriptor(name, editorReg, editorReg
				.getDefaultEditor(name, contentType));
	}
	/**
	 * Get the editor descriptor for a given name using the editorDescriptor
	 * passed in as a default as a starting point.
	 * 
	 * @param name
	 *            The name of the element to open.
	 * @param editorReg
	 *            The editor registry to do the lookups from.
	 * @param defaultDescriptor
	 *            IEditorDescriptor or <code>null</code>
	 * @return IEditorDescriptor
	 * @throws PartInitException
	 *             if no valid editor can be found
     *             
     * @since 3.1
	 */
	private static IEditorDescriptor getEditorDescriptor(String name,