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Added additional exception handling
Added additional exception handling
Added additional exception handling
FileMap tests added
Trying to add files (have problem)
Now read-only databases allowed
Now read-only databases allowed
Now read-only databases allowed
Update.
Update DataBase.java
charset extracted as constant
Added warned_unsaved constant
Some code rewritten in Java 8 style
Added close on exit
Merge branch 'task3' into task4
System property warn_unsaved is now set
Merge branch 'task4' into task5
Merge pull request #282 from volodden/first

Володин Денис, 396, 03-MultiFileMap
Checkstyle fix