diff --git a/script/source_code_filter.rb b/script/source_code_filter.rb
index 5bfcd865f..8a1fd562d 100755
--- a/script/source_code_filter.rb
+++ b/script/source_code_filter.rb
@@ -3,20 +3,23 @@
 
 require 'tempfile'
 require 'code_beauty_ruby.rb'
+
 def checkForHeader(fileName)
   foundHeader = false;
   foundSheBang = false;
   isCoffee = false;
 
-  header = "# Copyright (C) 2012-2013 Zammad Foundation, http://zammad-foundation.org/\n\n"
+  header = "# Copyright (C) 2012-2014 Zammad Foundation, http://zammad-foundation.org/\n"
   if File.extname(fileName) == '.coffee'
     isCoffee = true
   end
 
+  # read file
   file = File.open(fileName)
   t_file = Tempfile.new('Temp')
   allLines = IO.readlines(fileName)
 
+  # detect file type
   if allLines[0] =~ /(^# Copyright)/ || allLines[1] =~ /(^# Copyright)/
     foundHeader = true
   elsif allLines[1] =~/^=begin/ #assume external script
@@ -27,23 +30,37 @@ def checkForHeader(fileName)
   end
 
   file.each do |line|
+    # replace old header in script
     if file.lineno == 1 && foundSheBang && foundHeader
-      t_file.puts line
+      t_file.puts header
+
+    # insert new header
+    elsif file.lineno == 1 && !foundSheBang && foundHeader
+      t_file.puts header
+
+    # insert new header
     elsif file.lineno == 1 && !foundSheBang && !foundHeader
       t_file.puts header
-      t_file.puts line
+      t_file.puts line + "\n"
+
+    # insert new header into script
     elsif file.lineno == 1 && foundSheBang && !foundHeader
       t_file.puts line
-      t_file.puts header
+      t_file.puts header + "\n"
+
+    # strip lines
     else
       t_file.puts line.rstrip
     end
   end
 
+  # rename file
   t_file.rewind
   t_file.close
   FileUtils.cp(t_file.path, fileName)
   t_file.unlink
+
+  # beautify ruby file
   if !isCoffee
     t_file = RBeautify.beautify_file(fileName)
   end