I don't configure plugin templates, you also don't write plugins in Java/python.. JavaScript is web like what this forums uses. Minecraft is written in Java (Client & Server), thus what squad uses is Spigot which is written in Java (Spigot is a project created from forking Bukkit) Bukkit is as written in Java created after hmod died. Bukkit has the api that nearly everyone uses. I use eclipse as stated above (http://eclipse.org) and maven to create and add dependencys such as Bukkit/Spigot. You can find some of my public projects at https://github.com/breedev
And now i'm saying it so you can hear it from a mod. Just because you see others do it doesnt mean you should as its against the rules to do so. So in future just follow the rules.