Hi Onelook,
I'll try to write in English, for more users ...
nice utility, haven't tried but seem fine. About documentation, I don't know about any. I created one SQLite map in MOBAC and by that I created whole support. Only think you have to worry is this: don't create database with classic auto-increment index, create it just without it! It's much much faster and index is not needed! It takes me a lot of time to figure out this (I'm really not a database expert)!
so in Java I'm just creating these two tables in database
CREATE TABLE info (minzoom INTEGER,maxzoom INTEGER);
CREATE TABLE tiles (x INTEGER,y INTEGER,z INTEGER,s INTEGER,image BYTE, PRIMARY KEY (x, y, z, s));
how this is helpful for you if you have any troubles