Missing Controller

Error: PhotoGallery.htmlController could not be found.

Error: Create the class PhotoGallery.htmlController below in file: app/controllers/photo_gallery.html_controller.php

<?php
class PhotoGallery.htmlController extends AppController {

	var $name = 'PhotoGallery.html';
}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_controller.ctp