Bug 123989 Should ResourceChangeValidator#validateChange take a progress monitor
Since the validation might take some time it might make sense to pass a progress monitor into validateChange.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/IDE.java
*            the file
	 * @param determineContentType
	 *            query the content type system for the content type of the file
	 * @return an editor descriptor, appropriate for opening the file
	 * @throws PartInitException
	 *             if no editor can be found
	 * @since 3.1
	 */
    public static IEditorDescriptor getEditorDescriptor(IFile file, boolean determineContentType)
            throws PartInitException {
		if (file == null) {
			throw new IllegalArgumentException();
		}
		return getEditorDescriptor(file.getName(), PlatformUI.getWorkbench()
				.getEditorRegistry(), getDefaultEditor(file, determineContentType));
	}
	/**
	 * Returns an editor descriptor appropriate for opening a file resource with
	 * the given name.
	 * <p>
	 * The editor descriptor is determined using a multistep process. This
	 * method will attempt to infer content type from the file name.
	 * </p>
	 * <ol>
	 * <li>The file is consulted for a persistent property named
	 * <code>IDE.EDITOR_KEY</code> containing the preferred editor id to be
	 * used.</li>
	 * <li>The workbench editor registry is consulted to determine if an editor
	 * extension has been registered for the file type. If so, an instance of
	 * the editor extension is opened on the file. See