Sign check on Load

String[] arg = rset.getString("memotext").split(",");
                if(arg.length >= 4) {
                    try {
                        int i = 1;
                        for(String ar: arg) { PvPRewards.debug("Argument " + String.valueOf(i) + " ist gleich " + ar); i++; }
                        for(World wor: Bukkit.getWorlds()) { PvPRewards.debug("Verfuegbarer WeltName : " + wor.getName()); }

                        World world = Bukkit.getWorld(arg[0]);
                        if(world != null) {
                            double x = Double.parseDouble(arg[1]);
                            double y = Double.parseDouble(arg[2]);
                            double z = Double.parseDouble(arg[3]);
                            Location loc = new Location(world, (int)x, (int)y, (int)z );
                            if(loc != null) {
                                Block block = world.getBlockAt(loc);
                                if(block != null) {
                                    if(block.getType() == Material.SIGN_POST || block.getType() == Material.WALL_SIGN) {
                                        Sign sign = (Sign)block.getState();
                                        if(sign != null) {
                                            if(sign.getLine(0).equalsIgnoreCase("[" + ChatColor.DARK_GREEN + "Frei" + ChatColor.RESET + "]")) {
                                                plugin.addSignLocation(block);
                                            } else {
                                                PvPRewards.debug("Schild gefunden , doch text in Zeile 1 passt nicht. Aktueller Text : " + sign.getLine(0));
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    } catch(Exception e) {
                        throw new IllegalStateException("Fehler beim Laden einer Sign Location \"" + rset.getString("memotext") + "\"!", e);
                    }