After restarting the server gives an error

[joximu]

Well - if one file is empty, chances are big that other files are also empty.

If you want to check everything, then you need to have a look at index.php and go through the included/required files -and also check their for includes/required... etc...

It may be more easy to replace all files with the original... (except the db-key* and maybe other custom/config files...)

/J