Changes:
1) Used Intellij Idea Code Auto-Refactor

Need to:
1) add createEvent()
2) add jstl & some cosmetics for web UI (actually, web-UI should be fully reworked)
3) rework comments
4) add exception logging
5) refactor code
Changes:
1) Used Intellij Idea Code Auto-Refactor

Need to:
1) add createEvent()
2) add jstl & some cosmetics for web UI (actually, web-UI should be fully reworked)
3) rework comments
4) add exception logging
5) refactor code