[Bleeding] Changed event system into a new, much faster design. Huge thanks to @zml2008 & @lahwran.

By: Nathan Adams <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleBlockCollisionEvent.java

@@ -2,12 +2,14 @@ package org.bukkit.event.vehicle;
 
 import org.bukkit.block.Block;
 import org.bukkit.entity.Vehicle;
+import org.bukkit.event.HandlerList;
 
 /**
  * Raised when a vehicle collides with a block.
  */
 @SuppressWarnings("serial")
 public class VehicleBlockCollisionEvent extends VehicleCollisionEvent {
+    private static final HandlerList handlers = new HandlerList();
     private Block block;
 
     public VehicleBlockCollisionEvent(Vehicle vehicle, Block block) {
@@ -23,4 +25,13 @@ public class VehicleBlockCollisionEvent extends VehicleCollisionEvent {
     public Block getBlock() {
         return block;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleCollisionEvent.java

@@ -6,7 +6,7 @@ import org.bukkit.entity.Vehicle;
  * Raised when a vehicle collides.
  */
 @SuppressWarnings("serial")
-public class VehicleCollisionEvent extends VehicleEvent {
+public abstract class VehicleCollisionEvent extends VehicleEvent {
     public VehicleCollisionEvent(Type type, Vehicle vehicle) {
         super(type, vehicle);
     }

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleCreateEvent.java

@@ -1,13 +1,24 @@
 package org.bukkit.event.vehicle;
 
 import org.bukkit.entity.Vehicle;
+import org.bukkit.event.HandlerList;
 
 /**
  * Raised when a vehicle is created.
  */
 @SuppressWarnings("serial")
 public class VehicleCreateEvent extends VehicleEvent {
+    private static final HandlerList handlers = new HandlerList();
     public VehicleCreateEvent(Vehicle vehicle) {
         super(Type.VEHICLE_CREATE, vehicle);
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleDamageEvent.java

@@ -3,12 +3,14 @@ package org.bukkit.event.vehicle;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Vehicle;
 import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
 
 /**
  * Raised when a vehicle receives damage.
  */
 @SuppressWarnings("serial")
 public class VehicleDamageEvent extends VehicleEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
     private Entity attacker;
     private int damage;
     private boolean cancelled;
@@ -53,4 +55,13 @@ public class VehicleDamageEvent extends VehicleEvent implements Cancellable {
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleDestroyEvent.java

@@ -3,6 +3,7 @@ package org.bukkit.event.vehicle;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Vehicle;
 import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
 
 /**
  * Raised when a vehicle is destroyed, which could be caused by either a player
@@ -11,6 +12,7 @@ import org.bukkit.event.Cancellable;
  */
 @SuppressWarnings("serial")
 public class VehicleDestroyEvent extends VehicleEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
     private Entity attacker;
     private boolean cancelled;
 
@@ -35,4 +37,13 @@ public class VehicleDestroyEvent extends VehicleEvent implements Cancellable {
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleEnterEvent.java

@@ -3,12 +3,14 @@ package org.bukkit.event.vehicle;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Vehicle;
 import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
 
 /**
  * Raised when an entity enters a vehicle.
  */
 @SuppressWarnings("serial")
 public class VehicleEnterEvent extends VehicleEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
     private boolean cancelled;
     private Entity entered;
 
@@ -33,4 +35,13 @@ public class VehicleEnterEvent extends VehicleEvent implements Cancellable {
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleEntityCollisionEvent.java

@@ -3,12 +3,14 @@ package org.bukkit.event.vehicle;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Vehicle;
 import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
 
 /**
  * Raised when a vehicle collides with an entity.
  */
 @SuppressWarnings("serial")
 public class VehicleEntityCollisionEvent extends VehicleCollisionEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
     private Entity entity;
     private boolean cancelled = false;
     private boolean cancelledPickup = false;
@@ -46,4 +48,13 @@ public class VehicleEntityCollisionEvent extends VehicleCollisionEvent implement
     public void setCollisionCancelled(boolean cancel) {
         cancelledCollision = cancel;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleEvent.java

@@ -7,7 +7,7 @@ import org.bukkit.event.Event;
  * Represents a vehicle-related event.
  */
 @SuppressWarnings("serial")
-public class VehicleEvent extends Event {
+public abstract class VehicleEvent extends Event {
     protected Vehicle vehicle;
 
     public VehicleEvent(final Event.Type type, final Vehicle vehicle) {

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleExitEvent.java

@@ -3,12 +3,14 @@ package org.bukkit.event.vehicle;
 import org.bukkit.entity.LivingEntity;
 import org.bukkit.entity.Vehicle;
 import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
 
 /**
  * Raised when a living entity exits a vehicle.
  */
 @SuppressWarnings("serial")
 public class VehicleExitEvent extends VehicleEvent implements Cancellable {
+    private static final HandlerList handlers = new HandlerList();
     private boolean cancelled;
     private LivingEntity exited;
 
@@ -33,4 +35,13 @@ public class VehicleExitEvent extends VehicleEvent implements Cancellable {
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleListener.java

@@ -5,6 +5,7 @@ import org.bukkit.event.Listener;
 /**
  * Listener for vehicle events.
  */
+@Deprecated
 public class VehicleListener implements Listener {
     public VehicleListener() {}
 

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleMoveEvent.java

@@ -2,12 +2,14 @@ package org.bukkit.event.vehicle;
 
 import org.bukkit.Location;
 import org.bukkit.entity.Vehicle;
+import org.bukkit.event.HandlerList;
 
 /**
  * Raised when a vehicle moves.
  */
 @SuppressWarnings("serial")
 public class VehicleMoveEvent extends VehicleEvent {
+    private static final HandlerList handlers = new HandlerList();
     private Location from;
     private Location to;
 
@@ -35,4 +37,14 @@ public class VehicleMoveEvent extends VehicleEvent {
     public Location getTo() {
         return to;
     }
+
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }

paper-api/src/main/java/org/bukkit/event/vehicle/VehicleUpdateEvent.java

@@ -1,10 +1,21 @@
 package org.bukkit.event.vehicle;
 
 import org.bukkit.entity.Vehicle;
+import org.bukkit.event.HandlerList;
 
 @SuppressWarnings("serial")
 public class VehicleUpdateEvent extends VehicleEvent {
+    private static final HandlerList handlers = new HandlerList();
     public VehicleUpdateEvent(Vehicle vehicle) {
         super(Type.VEHICLE_UPDATE, vehicle);
     }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
 }