Remove possible leak when exception occurred.

nameUtf8 is not released after exception.
In addtion, Fix code going down after ThrowException.

Change-Id: Id46e8ed55acd98e982ae532f7da2c0c48847f010
When deleting a db file,
Context.deleteDatabase() has to be called instead of File.delete()
to guarantee all db related files
like journal, wal, shm, etc are deleted together.

Signed-off-by: jangwon.lee<jangwon.lee@lge.com>

Change-Id: I3c3d7dfa13ffbe709ab7d8a5c7cfe6cfa2864fea
Guarantee that all db related files are deleted together.

When deleting a db file, all db related files has to be deleted together
like journal, wal, shm etc.

Change-Id: I49d4581673d03fe669e9e0eaa2b50f7b9d3c34a4
Signed-off-by: jangwon.lee <jangwon.lee@lge.com>