Revert "Got database/ java interface running"

This reverts commit d046241853ece4c6cc4b531e74387518b3f55654.
Got database/ java interface running

Reasonably well, can insert data/ create tables etc. haven't split
everything into own functions yet however.
More fiddling around with the database stuff

Mostly figuring out the update functionality
Messing around with primary keys and loops