Saving info from inside of error handling

[B. T. Raven]

I have the following inside a loop where filename is changed and I want 
to build a string or list of filenames for which the user has answered 
that the existing file should be overwritten. Can I test for y-or-n-p 
return result (write-file defun in files.el) and have the program report 
in which places the files have been replaced with the contents of the 
current buffer?

  (condition-case nil
                    (write-file filename t)
                  (error nil))

Thanks,

Ed