Add Override annotations where appropriate

By: md_5 <git@md-5.net>

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

@@ -50,10 +50,12 @@ public class VehicleDamageEvent extends VehicleEvent implements Cancellable {
         this.damage = damage;
     }
 
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }

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

@@ -32,10 +32,12 @@ public class VehicleDestroyEvent extends VehicleEvent implements Cancellable {
         return attacker;
     }
 
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }

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

@@ -29,10 +29,12 @@ public class VehicleEnterEvent extends VehicleEvent implements Cancellable {
         return entered;
     }
 
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }

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

@@ -26,10 +26,12 @@ public class VehicleEntityCollisionEvent extends VehicleCollisionEvent implement
         return entity;
     }
 
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }

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

@@ -29,10 +29,12 @@ public class VehicleExitEvent extends VehicleEvent implements Cancellable {
         return exited;
     }
 
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
+    @Override
     public void setCancelled(boolean cancel) {
         this.cancelled = cancel;
     }