Help with designing a class

[silent]

I am working on a project that needs to have MySQL support (easy) and flat file support (not so easy)

I found this : http://www.c-worker.ch/txtdbapi/index_eng.php

which is an SQL interpreter for flat text files... it works pretty good.

I was just wondering what would be the best way to design a class that could use either one would be...

Any ideas would be great!