diff --git a/core/modules/system/lib/Drupal/system/Controller/DateTimeController.php b/core/modules/system/lib/Drupal/system/Controller/DateTimeController.php
index ae14bd4..a1ffc0e 100644
--- a/core/modules/system/lib/Drupal/system/Controller/DateTimeController.php
+++ b/core/modules/system/lib/Drupal/system/Controller/DateTimeController.php
@@ -1,21 +1,24 @@
 <?php
 
-namespace Drupal\system\Controller;
+/**
+ * @file
+ * Contains \Drupal\system\Controller\DateTimeController.
+ */
 
+namespace Drupal\system\Controller;
 
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
- * Class DateTimeController
- *
- * @package Drupal\system\Controller
+ * Route controller class for the date and time formats.
  */
 class DateTimeController {
 
   /**
-   * Compile a table of date formats that can be configured.
+   * Displays the date format strings overview page.
    *
-   * @return Renderable array
+   * @return array
+   *   An array as expected by drupal_render().
    */
   public function formats() {
     $header = array(