Begin implementation of CheckStyle style checking

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/help/HelpMap.java

@@ -10,7 +10,7 @@ import java.util.List;
  * The HelpMap tracks all help topics registered in a Bukkit server. When the
  * server starts up or is reloaded, help is processed and topics are added in
  * the following order:
- * 
+ *
  * <ol>
  * <li>General topics are loaded from the help.yml
  * <li>Plugins load and optionally call {@code addTopic()}
@@ -37,7 +37,7 @@ public interface HelpMap {
      */
     @NotNull
     public Collection<HelpTopic> getHelpTopics();
-    
+
     /**
      * Adds a topic to the server's help index.
      *