update journal
print level in LevelDataServiceImpl for debugging; make DBHandler a static variable in LevelDataServiceImpl
implement functions in ScoreService and add the need functionality to DBHandler
remove unused import
print level in LevelDataServiceImpl for debugging; make DBHandler a static variable in LevelDataServiceImpl
Merge branch 'feature_DB_ScoreService_saveAndRead' of github.com:liecj3/sokoban into feature_DB_ScoreService_saveAndRead