Bukkit

db:
    type: file # Database type
    database: minecraft # Database name
    host: localhost # Database host
    port: 3306 # Database port
    user: root # Database user
    pass: pass # Database password
    table:
        players: players # Table name for players permissions
        groups: groups # Table name for player groups
    column: # Individual name column
        playerid: playerid
        groupname: groupname
        permission: permission
        world: world
        value: value

Modify this values to fits with your database.

* Only MySQL is fully supported.
* File is for config file, rest of this part was simply ignored.
* Other database can be used, free free to report me bugs.