[API] A basic example of a custom event, more to come.

Essentials/src/com/earth2me/essentials/api/events/UserToggleGodmodeEvent.java

@@ -0,0 +1,52 @@
+package com.earth2me.essentials.api.events;
+
+import com.earth2me.essentials.User;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.HandlerList;
+
+
+public class UserToggleGodmodeEvent extends Event implements Cancellable
+{
+	private static final HandlerList handlers = new HandlerList();
+	private boolean cancelled;
+	private User user;
+	private boolean enabled;
+
+	/**
+	 * Thrown when a user's god mode is toggled.
+	 *
+	 * @param user - the user whose god mode is toggled.
+	 * @param enabled - true if god mode was enabled, false if disabled.
+	 */
+	public UserToggleGodmodeEvent (User user, boolean enabled)
+	{
+		enabled = this.enabled;
+		user = this.user;
+		this.cancelled = false;
+	}
+
+	@Override
+	public HandlerList getHandlers()
+	{
+		return handlers;
+	}
+
+	public static HandlerList getHandlerList()
+	{
+		return handlers;
+	}
+
+	@Override
+	public boolean isCancelled()
+	{
+		return cancelled;
+	}
+
+	@Override
+	public void setCancelled(boolean cancelled)
+	{
+		this.cancelled = cancelled;
+	}
+
+}

Essentials/src/com/earth2me/essentials/commands/Commandgod.java

@@ -2,6 +2,7 @@ package com.earth2me.essentials.commands;
 
 import static com.earth2me.essentials.I18n._;
 import com.earth2me.essentials.User;
+import com.earth2me.essentials.api.events.UserToggleGodmodeEvent;
 import org.bukkit.Server;
 import org.bukkit.command.CommandSender;
 
@@ -53,6 +54,8 @@ public class Commandgod extends EssentialsToggleCommand
 		}
 
 		user.setGodModeEnabled(enabled);
+		UserToggleGodmodeEvent event = new UserToggleGodmodeEvent(user, enabled);
+		ess.getServer().getPluginManager().callEvent(event);
 
 		if (enabled && user.getHealth() != 0)
 		{