diff --git a/Admin/Install/Comments.php b/Admin/Install/Comments.php
index fd7adcd..42194f5 100644
--- a/Admin/Install/Comments.php
+++ b/Admin/Install/Comments.php
@@ -45,6 +45,10 @@ class Comments
             ->addConstraint('news_comment_list', 'comment_list', 'comment_list_id');
 
         $mapper = \file_get_contents(__DIR__ . '/../../Models/NewsArticleMapper.php');
+        if ($mapper === false) {
+            throw new \Exception('Couldn\'t parse mapper');
+        }
+
         $mapper = \str_replace([
             '// @Module Comments ',
             '/* @Module Comments ',
diff --git a/Models/NewsArticle.php b/Models/NewsArticle.php
index e4ee96a..fdcdb85 100755
--- a/Models/NewsArticle.php
+++ b/Models/NewsArticle.php
@@ -202,7 +202,7 @@ class NewsArticle implements ArrayableInterface, \JsonSerializable
     /**
      * Set comment list
      *
-     * @param CommentList $comments
+     * @param int|CommentList $comments Comment list
      *
      * @return void
      *