Found in the source code of a site. Interesting.

Made a wonderful and good working module for a server. A few days later the jar file got renamed to a .BAK file. From the stacktrace I figured out itd be the configuration file (Json) that was crashing. Guy wouldnt send the config. Told him the problem but he ignored me.

Three days later he came up to me that he forgot a comma at the line end.

Ffs.