Overrode equals() on OpenBrace
Added negative equality test case and feature
Added test that OpenBrace.equals(null) will return false without crashing
Resurrected TokenizerTest
Added conditional return of empty array versus hard-coded OpenBrace
Extracted common structure in tests
Added CloseBrace and tests establishing CloseBrace
Added switch-on-input for Tokenizing
Replaced static instanceof calls with dynamic getClass().isInstace(...)