Enable several error prone checks

[ChrisJohnNOAA]

Description

Enables and fixes issues with a number of the ErrorProne checks. The checks I enabled were focused on threading issues, number conversions, formatting, and unused code.

Type of change

Please delete options that are not relevant.

• [ X ] Reduce technical debt

Checklist before requesting a review

• [ X ] I have performed a self-review of my code
• [ X ] My code follows the style guidelines of this project
• [ X ] I have commented my code, particularly in hard-to-understand areas
• [ X ] I have made corresponding changes to the documentation
• [ X ] My changes generate no new warnings
• [ X ] I have added tests that prove my fix is effective or that my feature works
• [ X ] New and existing unit tests pass locally with my changes