Timatable Managers 	- fixed NullPointerException thrown while adding a new manager
Timatable Managers
	- fixed NullPointerException thrown while adding a new manager

sktoo/timetabling-system-,maciej-zygmunt/unitime,maciej-zygmunt/unitime,nikeshmhr/unitime,sktoo/timetabling-system-,zuzanamullerova/unitime,zuzanamullerova/unitime,maciej-zygmunt/unitime,nikeshmhr/unitime,rafati/unitime,sktoo/timetabling-system-,UniTime/unitime,rafati/unitime,UniTime/unitime,rafati/unitime,UniTime/unitime,nikeshmhr/unitime,zuzanamullerova/unitime