Remember to add the actual command class ;)

src/com/garbagemule/MobArena/commands/setup/ClassChestCommand.java

@@ -0,0 +1,60 @@
+package com.garbagemule.MobArena.commands.setup;
+
+import com.garbagemule.MobArena.ArenaClass;
+import com.garbagemule.MobArena.Messenger;
+import com.garbagemule.MobArena.Msg;
+import com.garbagemule.MobArena.commands.Command;
+import com.garbagemule.MobArena.commands.CommandInfo;
+import com.garbagemule.MobArena.commands.Commands;
+import com.garbagemule.MobArena.framework.ArenaMaster;
+import org.bukkit.block.Block;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+@CommandInfo(
+    name    = "classchest",
+    pattern = "classchest",
+    usage   = "/ma classchest <class>",
+    desc    = "link a chest to a class",
+    permission = "mobarena.setup.classchest"
+)
+public class ClassChestCommand implements Command {
+    @Override
+    public boolean execute(ArenaMaster am, CommandSender sender, String... args) {
+        if (!Commands.isPlayer(sender)) {
+            Messenger.tellPlayer(sender, Msg.MISC_NOT_FROM_CONSOLE);
+            return false;
+        }
+
+        if (args.length != 1) {
+            Messenger.tellPlayer(sender, "Usage: /ma classchest <class>");
+            return true;
+        }
+
+        ArenaClass ac = am.getClasses().get(args[0].toLowerCase());
+        if (ac == null) {
+            Messenger.tellPlayer(sender, "Class not found.");
+            return true;
+        }
+
+        Player p = (Player) sender;
+        Block b = p.getTargetBlock(null, 10);
+
+        switch (b.getType()) {
+            case CHEST:
+            case LOCKED_CHEST:
+            case ENDER_CHEST:
+            case TRAPPED_CHEST:
+                break;
+            default:
+                Messenger.tellPlayer(sender, "You must look at a chest.");
+                return true;
+        }
+
+        am.getPlugin().getMAConfig().set("classes." + ac.getConfigName() + ".classchest", b.getLocation());
+        am.saveConfig();
+        Messenger.tellPlayer(sender, "Class chest updated for class " + ac.getConfigName());
+        am.loadClasses();
+        return true;
+    }
+}