Oracle File Extensions

Does anybody here know the file extensions for an oracle database and it's log file?

IE:
Access = *.mdb
SQL Server = *.mdf | *.ldf
Oracle = *.??? | *.???

You're my last hope... I've asked this on three programming forums, googled it for about 15 minutes, asked everybody in my office, and even called two ex-employees. Nobody can answer this amazingly simple question. Truly 4chan has the answer right?

What?

Dude, I need to code the filter for an open file dialog box. I can't use a DB abstraction layer in a string to pass to a dialog box control.

I need EXTENSIONS. For the line of code that reads:

"All Database Files|*.mdb;*.mdf;*.ora|Microsoft Access (*.mdb)|*.mdb|Microsoft SQL Server (*.mdf)|*.mdf|Oracle Database (*.???)|*.???|All Files|*.*"

Just answer the question... please for the love of fucking christ. I've waisted a whole days work on this... just somebody tell me what the fucking extensions are.