
Extend this class to create your own DBUpdater.
If you have an existing JOTDB (Using JOTMOdel's) and you need to change some model/tables
definition (ie: add fields, rename columns etc ...) you should create a DBUpdater from it and imp,ement upgradeDb()
You must define your implementaion in db.properties:
Ex: db.upgrader.class = com.mycomp.mydb.MyUpgrader
Then in the upgradeDb() you can handle the upgrade,