Adds missing JavaDoc

src/main/java/net/knarcraft/stargate/portal/PortalOpener.java

@@ -71,7 +71,8 @@ public class PortalOpener {
     /**
      * Open this portal opener's portal
      *
-     * @param force <p>Whether to force the portal open, even if it's already open for some player</p>
+     * @param openFor <p>The player to open the portal for</p>
+     * @param force   <p>Whether to force the portal open, even if it's already open for some player</p>
      */
     public void openPortal(Player openFor, boolean force) {
         //Call the StargateOpenEvent to allow the opening to be cancelled

src/main/java/net/knarcraft/stargate/portal/Teleporter.java

@@ -24,7 +24,13 @@ import java.util.List;
  */
 public abstract class Teleporter {
 
+    /**
+     * The portal the entity is teleporting to
+     */
     protected final Portal portal;
+    /**
+     * The scheduler to use for delaying tasks
+     */
     protected final BukkitScheduler scheduler;
 
     /**