diff --git a/inc/controller/ajax/articles/draft.php b/inc/controller/ajax/articles/draft.php
index ec214a930..ed237b81b 100644
--- a/inc/controller/ajax/articles/draft.php
+++ b/inc/controller/ajax/articles/draft.php
@@ -40,5 +40,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/articles/editorlist.php b/inc/controller/ajax/articles/editorlist.php
index ee9368645..68adc4e4c 100644
--- a/inc/controller/ajax/articles/editorlist.php
+++ b/inc/controller/ajax/articles/editorlist.php
@@ -231,5 +231,3 @@ protected function initObjectsShortlink()
     }
 
 }
-
-?>
diff --git a/inc/controller/ajax/articles/imgupload.php b/inc/controller/ajax/articles/imgupload.php
index a193eab78..5deb59142 100644
--- a/inc/controller/ajax/articles/imgupload.php
+++ b/inc/controller/ajax/articles/imgupload.php
@@ -61,5 +61,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/articles/listnewtweets.php b/inc/controller/ajax/articles/listnewtweets.php
index f1e17889e..fe5c821f1 100644
--- a/inc/controller/ajax/articles/listnewtweets.php
+++ b/inc/controller/ajax/articles/listnewtweets.php
@@ -124,5 +124,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/articles/massedit.php b/inc/controller/ajax/articles/massedit.php
index 159ea2ea2..0b8e6f9f0 100644
--- a/inc/controller/ajax/articles/massedit.php
+++ b/inc/controller/ajax/articles/massedit.php
@@ -95,5 +95,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/articles/removeeditortags.php b/inc/controller/ajax/articles/removeeditortags.php
index 671bf38ce..91f211d85 100644
--- a/inc/controller/ajax/articles/removeeditortags.php
+++ b/inc/controller/ajax/articles/removeeditortags.php
@@ -36,5 +36,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/articles/smileys.php b/inc/controller/ajax/articles/smileys.php
index d0e45ad17..1205dcd9a 100644
--- a/inc/controller/ajax/articles/smileys.php
+++ b/inc/controller/ajax/articles/smileys.php
@@ -51,5 +51,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/categories/massedit.php b/inc/controller/ajax/categories/massedit.php
index 86b7d2973..e8680cd88 100644
--- a/inc/controller/ajax/categories/massedit.php
+++ b/inc/controller/ajax/categories/massedit.php
@@ -76,5 +76,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/comments/delete.php b/inc/controller/ajax/comments/delete.php
index d70f639a4..3bb151157 100644
--- a/inc/controller/ajax/comments/delete.php
+++ b/inc/controller/ajax/comments/delete.php
@@ -61,5 +61,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/comments/lockIp.php b/inc/controller/ajax/comments/lockIp.php
index 309a1a86c..7f454f6ed 100644
--- a/inc/controller/ajax/comments/lockIp.php
+++ b/inc/controller/ajax/comments/lockIp.php
@@ -68,5 +68,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/comments/search.php b/inc/controller/ajax/comments/search.php
index c9a79c0b9..1333a01ae 100644
--- a/inc/controller/ajax/comments/search.php
+++ b/inc/controller/ajax/comments/search.php
@@ -111,5 +111,3 @@ public function process()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/common/autocompleteCleanup.php b/inc/controller/ajax/common/autocompleteCleanup.php
index feaf4d1b2..2f840952a 100644
--- a/inc/controller/ajax/common/autocompleteCleanup.php
+++ b/inc/controller/ajax/common/autocompleteCleanup.php
@@ -80,5 +80,3 @@ private function hasNoArticlesAccess() : bool
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/common/cache.php b/inc/controller/ajax/common/cache.php
index 5955e5d3e..26d07f5c5 100644
--- a/inc/controller/ajax/common/cache.php
+++ b/inc/controller/ajax/common/cache.php
@@ -109,5 +109,3 @@ private function cleanupArticles()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/common/clearTrash.php b/inc/controller/ajax/common/clearTrash.php
index 9c3422511..44b08250e 100644
--- a/inc/controller/ajax/common/clearTrash.php
+++ b/inc/controller/ajax/common/clearTrash.php
@@ -171,5 +171,3 @@ protected function processrestoreComments()
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/installer/checkdb.php b/inc/controller/ajax/installer/checkdb.php
index ce59eafd6..5bfdf41ac 100644
--- a/inc/controller/ajax/installer/checkdb.php
+++ b/inc/controller/ajax/installer/checkdb.php
@@ -84,5 +84,3 @@ protected function initPermissionObject(): bool
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/controller/ajax/installer/initdb.php b/inc/controller/ajax/installer/initdb.php
index c643d1fea..d5b394a74 100644
--- a/inc/controller/ajax/installer/initdb.php
+++ b/inc/controller/ajax/installer/initdb.php
@@ -155,5 +155,3 @@ protected function initPermissionObject(): bool
     }
 
 }
-
-?>
\ No newline at end of file
diff --git a/inc/migrations/v521rc1.php b/inc/migrations/v521rc1.php
index 1a2c68d8a..876227381 100644
--- a/inc/migrations/v521rc1.php
+++ b/inc/migrations/v521rc1.php
@@ -90,10 +90,10 @@ protected function updateFileSystem(): bool {
 
             array_map(function ($f) {
                 
-                if ( !file_exists($f) ) {
+                if ( !file_exists($f) || !is_writable($f) ) {
                     return false;
                 }
-                
+
                 return unlink($f);
             }, $diff);