diff --git a/php/model/LocalArticleManager.php b/php/model/LocalArticleManager.php
index 5e65247..6df27e9 100644
--- a/php/model/LocalArticleManager.php
+++ b/php/model/LocalArticleManager.php
@@ -36,14 +36,19 @@ class LocalArticleManager implements ArticleManagerDAO {
      * Speichert alle Artikel/Beiträge in der Datei.
      * @param $articles
      * @return void
-     * TODO: Exceptions implementieren.
+     * @throws InternalServerErrorException
      */
-    public function saveArticle($articles)
+    private function saveArticle($articles)
     {
-        file_put_contents(
-            $this->file,
-            json_encode($articles, JSON_PRETTY_PRINT)
-        );
+        try{
+            file_put_contents(
+                $this->file,
+                json_encode($articles, JSON_PRETTY_PRINT)
+            );
+        }catch (Exception $e){
+            throw new InternalServerErrorException($e->getMessage());
+        }
+
     }
 
     public function addArticle($title, $content, $author, $category, $tags)