Database not closing

[camhart]

Describe the bug
If you create eThree as needed (instead of keeping one around as a singleton), you'll see a handful of these warning messages.

2020-07-09 21:08:06.222 18133-18169/com.my.app W/System: A resource failed to call close. 
2020-07-09 21:08:06.222 18133-18169/com.my.app W/SQLiteConnectionPool: A SQLiteConnection object for database '/data/user/0/com.my.app/databases/ethree-database-ddc31112-c8e9-47a4-970e-20d3ec7d82b7' was leaked!  Please fix your application to end transactions in progress properly and to close the database when it is no longer needed.