diff --git a/php/model/DatabaseArticleManager.php b/php/model/DatabaseArticleManager.php
index 3560167..a8d7ec4 100644
--- a/php/model/DatabaseArticleManager.php
+++ b/php/model/DatabaseArticleManager.php
@@ -1,4 +1,5 @@
 <?php
+require_once 'DatabaseInitializer.php';
 require_once 'ArticleManagerDAO.php';
 require_once 'Article.php';
 /**
diff --git a/php/model/DatabaseCommentManager.php b/php/model/DatabaseCommentManager.php
index e46a9ce..aebe73c 100644
--- a/php/model/DatabaseCommentManager.php
+++ b/php/model/DatabaseCommentManager.php
@@ -1,5 +1,5 @@
 <?php
-
+require_once 'DatabaseInitializer.php';
 require_once "CommentManagerDAO.php";
 require_once "Comment.php";
 
diff --git a/php/model/DatabaseInitializer.php b/php/model/DatabaseInitializer.php
index 5e2dc3b..2964062 100644
--- a/php/model/DatabaseInitializer.php
+++ b/php/model/DatabaseInitializer.php
@@ -1,4 +1,5 @@
 <?php
+require_once 'DatabaseInitializer.php';
 /**
  * Diese Klasse legt einmalig beim allerersten Start in der exakt korrekten Reihenfolge die Tabellen an
  *
diff --git a/php/model/DatabaseUserManager.php b/php/model/DatabaseUserManager.php
index afbf71a..8a7cc47 100644
--- a/php/model/DatabaseUserManager.php
+++ b/php/model/DatabaseUserManager.php
@@ -1,5 +1,5 @@
 <?php
-
+require_once 'DatabaseInitializer.php';
 require_once "UserManagerDAO.php";
 
 /**