Fix SpotBugs
Description
So it turned out SpotBugs only ran on the common source, which is very simple and does not have many opportunities for bugs. The rest of the project has, though, so this branch attempts to fix it all.
Changes
See the list of commits, they're very granular.
Additions
SpotBugs tasks for all projects, not just the root project.
Test and Review
To be filled in by the reviewers
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All of the methods are commented to expectation -
The methods are tested to satisfaction -
There are no unnecessary files present in the MR -
The continuous integration has no problems with the MR -
The MR is filled in as requested (including labels, milestones, and reviewers) -
The documentation is up-to-date -
All nullable parameters are marked as such
Edited by Luc Everse