Extremely Simple Dimensional Enter Messages

Simple, simple, simple—it's the name of the game, right? No, it's not. I just have no clue how to make anything more complicated than this. But, for what it's worth, it works flawlessly.

This plugin, if you couldn't tell by now, sends chat messages when a player enters either the: nether, end, or overworld. The chat messages are customizable with Minecraft formatting codes. This is roughly what the plugin looks like with the default config:

Swordee has entered the Nether .
Swordee has entered the End .
Swordee has entered the Overworld .

Pretty simple. But, why was this plugin made? That answer to that would be: for fun.