- catch all runtime exceptions declared by FileSystems.newFileSystem
 - don't use e.printStackTrace()
 - log errors if classes can't be found or module can't be initialized
etc.
 - use try with resources
 - use blocks for if/else


Change-Id: I8fddf164efb7658d452f054ac3a80ccb54e5f3f0
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>