Gets rid of the rest of the modX and modY usages, and removes some unused code

src/main/java/net/knarcraft/stargate/event/StargateOpenEvent.java

@@ -8,6 +8,7 @@ import org.jetbrains.annotations.NotNull;
 /**
  * This event should be called whenever a player opens a stargate
  */
+@SuppressWarnings({"unused"})
 public class StargateOpenEvent extends StargatePlayerEvent {
 
     private static final HandlerList handlers = new HandlerList();

src/main/java/net/knarcraft/stargate/event/StargatePlayerEvent.java

@@ -6,6 +6,7 @@ import org.bukkit.entity.Player;
 /**
  * An abstract event describing any stargate event where a player is involved
  */
+@SuppressWarnings("unused")
 public abstract class StargatePlayerEvent extends StargateEvent {
 
     private final Player player;

src/main/java/net/knarcraft/stargate/event/StargatePortalEvent.java

@@ -41,9 +41,9 @@ public class StargatePortalEvent extends StargatePlayerEvent {
     }
 
     /**
-     * Return the destination gate
+     * Return the destination portal
      *
-     * @return destination gate
+     * @return <p>The destination portal</p>
      */
     public Portal getDestination() {
         return destination;
@@ -52,14 +52,14 @@ public class StargatePortalEvent extends StargatePlayerEvent {
     /**
      * Return the location of the players exit point
      *
-     * @return org.bukkit.Location Location of the exit point
+     * @return <p>Location of the exit point</p>
      */
     public Location getExit() {
         return exit;
     }
 
     /**
-     * Set the location of the players exit point
+     * Set the location of the player's exit point
      */
     public void setExit(Location loc) {
         this.exit = loc;