[SamCarlberg]

The issue is that when your subsystems are initialized, they get their values for all the RobotMap variables before those variables have been initialized. So you can either

1. Initialize subsystems after calling RobotMap.init(); or
2. Call RobotMap.init() in a static block in the RobotMap class; or
3. Remove RobotMap.init() altogether and initialize its contents inline

What you're basically doing is:

Object a = null;
Object b = a; // set b to the _current_ value of a, which is null
a = new Object();

...

b.doSomething(); // null pointer exception!