public class OutputDeathMessage {
    static DeathMessage Default = new DeathMessage("Default","CustomizedDeathMessages.Default","%victim% was shot by arrow", "%victim% was shot by Skeleton", ...);
    static String simplemsg;
    String Cause;

    public static void  NoKiller(String DeathMsg, Player Victim) {
        simplemsg = DeathMsg.replace(Victim.getName(), "");

        //which attribute of Default contains simplemsg? Set Cause to this Value
        //Bukkit.broadcastMessage(CustomDeathMessage.(WhateverTheCauseIs).replace("%victim%", Victim.getName()));

        }
}