improve code style

src/Entities/SubscriptionList.php

@@ -1,10 +1,22 @@
 <?php
 
+/**
+ * Copyright (c) D3 Data Development (Inh. Thomas Dartsch)
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ *
+ * https://www.d3data.de
+ *
+ * @copyright (C) D3 Data Development (Inh. Thomas Dartsch)
+ * @author    D3 Data Development - Daniel Seifert <info@shopmodule.com>
+ * @link      https://www.oxidmodule.com
+ */
+
 namespace D3\KlicktippPhpClient\Entities;
 
 use Doctrine\Common\Collections\ArrayCollection;
 
 class SubscriptionList extends ArrayCollection
 {
-
-}
+}