Fixed bug with ; splitting. No more atomic boolean. Map instead of case in Command class.
AutoCloseable implementation and try-with-resources statement in DbReader
Same for DbWriter
+some checkstyle
Merge branch 'FileMap' into MutiFileHashMap

Conflicts:
	src/ru/fizteh/fivt/students/AlexeyZhuravlev/filemap/ListCommand.java
+some additions in MitiFileMap for some new FileMap interfaces