Added command registration to plugin config file. Registered commands are sent to the corresponding plugin.onCommand method when executed.

src/main/java/org/bukkit/plugin/SimpleCommandManager.java

@@ -0,0 +1,62 @@
+package org.bukkit.plugin;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.bukkit.entity.Player;
+
+public final class SimpleCommandManager implements CommandManager {
+    private final Map<String, Command> registeredCommands = new HashMap<String, Command>();
+    
+    /**
+     * Registers all the commands specified in the description file of a plugin.
+     * @param plugin
+     * @return
+     */
+    public boolean registerCommands(Plugin plugin) {
+        List<Command> commands = CommandParserYaml.parse(plugin);
+        boolean existsCommands = (commands != null);
+        
+        if (existsCommands) {
+            for(Command c : commands) {
+                if (!registerCommand(c))
+                    return false; // Command name conflict :(
+            }
+        }
+        return existsCommands;
+    }
+    
+    public boolean registerCommand(Command command) {
+        return registerCommand(command.getName(), command.getTooltip(), command.getHelpMessage(), command.getPlugin());
+    }
+
+    /** 
+     * {@inheritDoc}
+     */
+    public boolean registerCommand(String command, String tooltip, String helpMessage, Plugin plugin) {
+        boolean nameAvailable = (registeredCommands.get(command) == null);
+        
+        if (nameAvailable) {
+            Command newCmd = new Command(command, tooltip, helpMessage, plugin);
+            registeredCommands.put(command, newCmd);
+        }        
+        return nameAvailable;
+    }
+
+    /** 
+     * {@inheritDoc}
+     */
+    public boolean dispatchCommand(Player sender, String cmdLine) {
+        String[] args = cmdLine.split(" ");
+       
+        // Remove '/'-prefix and check if command is registered.
+        Command target = registeredCommands.get(args[0].substring(1)); 
+        boolean targetFound = (target != null);
+        
+        if (targetFound) {
+            target.getPlugin().onCommand(sender, args[0], args);
+        }
+        return targetFound;
+    }
+}