Missing Files

Files Not Found :
Creating the Model : 'app/model/sitemap.xml.php'

<?php
class sitemap.xml extends AppModel{
    public function __construct(){
        parent::__construct('sitemap.xml');
    }
}
?>

Creating the Controller : 'app/controller/sitemap.xml_controller.php'

<?php
class sitemap.xmlController extends AppController{
	function home(){
		// home function
	}
}
?>