Wrapped main body of RMG in a try-catch block.
Wrapped main body of RMG in a try-catch block.

This allows us to handle exceptions that are not otherwise caught, failing
gracefully when this occurs.

Also fixed some formatting in the RMG.main() function.

KEHANG/RMG-Java,keceli/RMG-Java,nyee/RMG-Java,ReactionMechanismGenerator/RMG-Java,ReactionMechanismGenerator/RMG-Java,nyee/RMG-Java,nyee/RMG-Java,ReactionMechanismGenerator/RMG-Java,jwallen/RMG-Java,keceli/RMG-Java,connie/RMG-Java,faribas/RMG-Java,enochd/RMG-Java,KEHANG/RMG-Java,ReactionMechanismGenerator/RMG-Java,rwest/RMG-Java,connie/RMG-Java,rwest/RMG-Java,jwallen/RMG-Java,rwest/RMG-Java,jwallen/RMG-Java,nyee/RMG-Java,keceli/RMG-Java,faribas/RMG-Java,rwest/RMG-Java,KEHANG/RMG-Java,connie/RMG-Java,keceli/RMG-Java,KEHANG/RMG-Java,KEHANG/RMG-Java,jwallen/RMG-Java,connie/RMG-Java,enochd/RMG-Java,keceli/RMG-Java,enochd/RMG-Java,keceli/RMG-Java,jwallen/RMG-Java,faribas/RMG-Java,KEHANG/RMG-Java,nyee/RMG-Java,nyee/RMG-Java,enochd/RMG-Java,enochd/RMG-Java,connie/RMG-Java,jwallen/RMG-Java,faribas/RMG-Java,ReactionMechanismGenerator/RMG-Java,enochd/RMG-Java,rwest/RMG-Java