Error establishing a database connection

Try logging into FTP and making sure there is no .maintenance file, also erase the upgrade folder. Its never a good idea to stop wordpress during an automatic update. Take a look at your wp-config file to make sure everything appears correct, it could of been editing it and you cut it off half way.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)