How can i write to file in background in elisp...

[Oleksandr Gavenko]

I write:

  (let (
        (coding-system-for-read 'utf-8)
        (coding-system-for-write 'utf-8)
        )
    (save-excursion
      (find-file stmcrblog-file)
      (beginning-of-buffer)
      (insert
       (format-time-string "%Y-%m-%d %H:%M" (current-time))
       " "  msg  "\n")
      (save-buffer)
      (kill-buffer)
      ))

but afraid that this is not correct way to write to file without splashing it
into to user...

How can i write to file in background in elisp?

-- 
Best regards!