Does the Mangager generate cool manga characters from a database? :)
Oh, I get it, you mean DB Manager. Oh well. There's
quite a few of these already, so you might consider adding
to a project rather than starting your own. I usually bring
up WDBI since I've used it the most, and it already works with
multiple databases. It's home page is ominously silent, however;
but a quick trip to FreshMeat showed me some new DB definer/managers
that I'd never seen before, so no worries.
If you feel you really must write another one of these yourself, then I suggest
taking most of what you have now and moving it to a module named for MySQL.
Then install yourself some PostgreSQL and make another module for it.
By getting at least two databases working, you'll have migrated a good portion
of the non-portable code out of the main program and also will have created
a framework for others to add databases, should they be inclined.