Add Datasource extensions

[Mining J]

Hello.

I made ExceptionSorter and ValidConnectionChecker to use the CUBRID(Open Source RDBMS) in WildFly.

And I would like to contribute to ironjacamar for users who work in the same environment as me.

The problem is that I don't have a lot of open source experience, so I don't know the rules to contribute to your project.

Therefore I would appreciate it if you could let me know if there are any rules or restrictions I should follow to contribute to your project.

Thanks.