Implemented PluginEnabled and PluginDisabled

src/main/java/org/bukkit/event/server/PluginEvent.java

@@ -0,0 +1,26 @@
+
+package org.bukkit.event.server;
+
+import org.bukkit.plugin.Plugin;
+
+/**
+ * Used for plugin loaded and unloaded events
+ */
+public class PluginEvent extends ServerEvent {
+    private final Plugin plugin;
+
+    public PluginEvent(final Type type, final Plugin plugin) {
+        super(type);
+
+        this.plugin = plugin;
+    }
+
+    /**
+     * Gets the plugin involved in this event
+     *
+     * @return Plugin for this event
+     */
+    public Plugin getPlugin() {
+        return plugin;
+    }
+}