This is more of an idea than an error. I noticed you have a small banking system were players can create banks and deposit/ withdraw from specific banks. I thought this was a great idea, but I feel like it's lacking content. It would cool if bank owners could set up a loan system where bank owners could create a line of credit for players seeking to borrow. With custom parameters and setting for banks to setup. Such as interest periods and rates. If borrowers are unable to make the payments on their loan they might not be able to buy anything from shops or lower their credit score.

I thought I would share my idea. My java skill is limited, but I will see if I can write some code on this.