Javadoc updates

Fixes BUKKIT-1653, Fixes BUKKIT-1383 and Fixes BUKKIT-1644

By: feildmaster <admin@feildmaster.com>

paper-api/src/main/java/org/bukkit/Server.java

@@ -304,7 +304,7 @@ public interface Server extends PluginMessageRecipient {
 
     /**
      * Creates or loads a world with the given name using the specified options.
-     * <p>
+     * <p />
      * If the world is already loaded, it will just return the equivalent of
      * getWorld(creator.name()).
      *