diff --git a/php/model/LocalArticleManager.php b/php/model/LocalArticleManager.php
index df715e3..f2cfb92 100644
--- a/php/model/LocalArticleManager.php
+++ b/php/model/LocalArticleManager.php
@@ -9,9 +9,17 @@ require_once 'Article.php';
  */
 class LocalArticleManager implements ArticleManagerDAO {
 
-    private $file = '../../data/articles.json';
+    private $file;
     private static $instance = null;
 
+    /**
+     * Konstruktor
+     */
+    public function __construct()
+    {
+        $this->file = __DIR__ . '../../data/articles.json';;
+    }
+
     /**
      * Gibt die LocalArticleManager-Instanz zurück.
      * @return LocalArticleManager