The plugin was majorly broken on Java 8 but now its fixed! I also added a reload command: "/esreload" with an accompanying permission: "energeticstorage.reload". This also fixes an other duplication bug when the user would right click a stack of items into the terminal. More info about the bug here. I also made it so when an ES System is broken, it will drop a head named "ES System" instead of a "Player Head".