change attributes modifier for AnagramSubject to *private final*
change attributes modifier for AnagramSubject to *private final*

jtigger/xjava,FridaTveit/xjava,nickRm/xjava,jmluy/xjava,nickRm/xjava,FridaTveit/xjava,jtigger/xjava,jmluy/xjava,exercism/xjava,masters3d/xjava,exercism/xjava,masters3d/xjava