Few additions to Plugin for retrieving the Server and PluginLoader responsible for the plugin

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-api/src/org/bukkit/plugin/Plugin.java

@@ -1,11 +1,44 @@
 
 package org.bukkit.plugin;
 
+import org.bukkit.Server;
+
 /**
  * Represents a plugin
  */
 public abstract class Plugin {
     private boolean isEnabled = false;
+    private final PluginLoader loader;
+    private final Server server;
+
+    /**
+     * Constructs a new plugin instance
+     *
+     * @param pluginLoader PluginLoader that is responsible for this plugin
+     * @param instance Server instance that is running this plugin
+     */
+    protected Plugin(PluginLoader pluginLoader, Server instance) {
+        loader = pluginLoader;
+        server = instance;
+    }
+
+    /**
+     * Gets the associated PluginLoader responsible for this plugin
+     *
+     * @return PluginLoader that controls this plugin
+     */
+    protected final PluginLoader getPluginLoader() {
+        return loader;
+    }
+
+    /**
+     * Returns the Server instance currently running this plugin
+     *
+     * @return Server running this plugin
+     */
+    public final Server getServer() {
+        return server;
+    }
 
     /**
      * Returns a value indicating whether or not this plugin is currently enabled

paper-api/src/org/bukkit/plugin/PluginManager.java

@@ -26,8 +26,9 @@ public final class PluginManager {
      * Registers the specified plugin loader
      *
      * @param loader Class name of the PluginLoader to register
+     * @throws IllegalArgumentException Thrown when the given Class is not a valid PluginLoader
      */
-    public void RegisterInterface(Class loader) {
+    public void RegisterInterface(Class loader) throws IllegalArgumentException {
         PluginLoader instance;
 
         if (PluginLoader.class.isAssignableFrom(loader)) {