Added documentation / explanation for the ServerLoadEvent

src/main/java/me/clip/placeholderapi/ServerLoadEventListener.java

@@ -1,6 +1,7 @@
 package me.clip.placeholderapi;
 
 import java.util.Map;
+
 import org.bukkit.Bukkit;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
@@ -15,6 +16,15 @@ public class ServerLoadEventListener implements Listener {
         Bukkit.getPluginManager().registerEvents(this, instance);
     }
 
+    /**
+     * This method will be called when the server is first loaded
+     *
+     * The goal of the method is to register all the expansions as soon as possible
+     * especially before players can join
+     *
+     * This will ensure no issues with expanions and hooks.
+     * @param e the server load event
+     */
     @EventHandler
     public void onServerLoad(ServerLoadEvent e) {
         plugin.getLogger().info("Placeholder expansion registration initializing...");