systemctl status ufw.service
● ufw.service - CLI Netfilter Manager
   Loaded: loaded (/usr/lib/systemd/system/ufw.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Wed 2016-01-06 15:28:55 CET; 3h 59min ago
  Process: 188 ExecStart=/usr/lib/ufw/ufw-init start (code=exited, status=2)
 Main PID: 188 (code=exited, status=2)

Jan 06 15:28:55 tambalamba systemd[1]: ufw.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
Jan 06 15:28:55 tambalamba systemd[1]: Failed to start CLI Netfilter Manager.
Jan 06 15:28:55 tambalamba systemd[1]: ufw.service: Unit entered failed state.
Jan 06 15:28:55 tambalamba systemd[1]: ufw.service: Failed with result 'exit-code'.
Jan 06 15:28:55 tambalamba ufw-init[188]: /etc/default/ufw: line 44: unexpected EOF while looking for matching `"'