How can i Create an automated testing program for my database

i am trying to learn testing environments and i would like to know if there is a way to create a java back-end application that will preform automated data entries into my database for me. I want to try do this to force out any errors in my code. Or are there any frameworks that might be able to do this for me?

i am using netbeans 8.1 with a MySql database(version 5.7.20). I have also used the Speedment ORM framework to connect the two.

Any help or suggestions would be great thank you!