Minor comment and formatting cleanup

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

@@ -30,7 +30,7 @@ public class Gate {
     private final Material portalClosedBlock;
     private final Material portalButton;
 
-    // Economy information
+    //Economy information
     private final int useCost;
     private final int createCost;
     private final int destroyCost;

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

@@ -513,7 +513,7 @@ public class Portal {
     /**
      * Adjusts the rotation of the player to face out from the portal
      *
-     * @param exit   <p>The location the player will exit from</p>
+     * @param exit <p>The location the player will exit from</p>
      */
     private void adjustRotation(Location exit) {
         int adjust = 0;

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

@@ -1,5 +1,8 @@
 package net.knarcraft.stargate.portal;
 
+/**
+ * Each enum value represents one option a portal can have/use
+ */
 public enum PortalOption {
 
     /**