maxmind/MaxMind-DB-Reader-java — pull request #7 by asnare (2014-08-25 12:02:37+00:00)
Title: Don't hold the underlying file/channel open for longer than necessary.

When loading from a database, once read and/or mapped the file/channel can be safely closed.
(Even when using MEMORY_MAPPED, once we have the mapped buffer the original file can be safely closed without affecting the buffer.)