The Bukkit ServicesManager can be used to obtain a OnlineTimeStorage instance.

Added support for PlaceholderAPI in conjunction with Bungee:
Install OnlineTime on all Spigot instances and set mode to slave, also set mode of Bungee instance to master.

Thanks to yudete for adding Japanese translation.

As PlaceholderAPI support for Bungee / Waterfall requires communication between sever and proxy it is postponed.

This plugin is now an universal resource. There is no benefit of installing this plugin on both Spigot and Bungee.

Storage access during connect and disconnect was not executed async.

Changing onlinetime of connected players didn't work properly: The changed amount got divided by 1000 and inverted. If you added 1000 seconds, one second would be subtracted instead.
This did only apply to connected players and is now fixed.

Changing to German language cause the plugin to not enable properly as the uppercase letter was an invalid time unit symbol. Added support for all unicode letters and disabled case insensitive matching.

There was an issue with resetting and subtracting time from players, causing an sql exception and not writing the changed data.
Also tested for latest waterfall release, thus now with official 1.14 support.

There are now commands to modify onlinetime of players:
Additionally the basic structure for configuration file migration was added. Following updates will not require manual recreation of config files.
Be aware, that this version will only backup your config and the recreate the config, resulting in new "untouched" files. This should be the last time that the configuration must be merged manually.

Switched to using HikariCP as database pool.
The previous database implementation was not properly synchronized and could read / write wrong data from / to the database.
Performance should also be better now.
The database will now NOT be automatically created, this has to be done manually!

As this update made deep changes to the configuration, they should be regenerated!

This update also includes a permissions fix: A player without onlinetime.see.other was able to see if a player has not yet played on the network.

Added basic permissions:
Hotfix:
Added missing IF NOT EXISTS to database creation statement.