If you feel like you can improve the plugin any way, then you are more than welcome to contribute to PlotSquared. It would be highly appreciated if you made sure to test your code before committing it, as it will save us a lot of time and effort.
If you are planning to commit any changes to the project, it would be highly appreciated if you were to follow the project code style conventions. To make this easier we have provided settings that can be imported into your IDE.
Eclipse: Window > Preferences > Java > Code Style > Formatter Press Import and select ...path/to/project/code_style.xml
IntelliJ: File > Settings > Editor > Code Style. Next to "Scheme" there is a cog wheel, press that and then Import Scheme > IntelliJ IDEA Code Style XML and then select ..path/to/project/code_style.xml