Missing Controller

Error: AboutThingstodo.htmlController could not be found.

Error: Create the class AboutThingstodo.htmlController below in file: app/controllers/about_thingstodo.html_controller.php

<?php
class AboutThingstodo.htmlController extends AppController {

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

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