Move passenger-handling to CraftEntity

src/main/java/org/bukkit/craftbukkit/entity/CraftEntity.java

@@ -196,4 +196,30 @@ public abstract class CraftEntity implements org.bukkit.entity.Entity {
     public void setMomentum(Vector value) {
         setVelocity(value);
     }
+
+    public CraftEntity getPassenger() {
+        return isEmpty() ? null : (CraftEntity) getHandle().passenger.getBukkitEntity();
+    }
+
+    public boolean setPassenger(org.bukkit.entity.Entity passenger) {
+        if (passenger instanceof CraftEntity){
+            ((CraftEntity) passenger).getHandle().setPassengerOf(getHandle());
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public boolean isEmpty() {
+        return getHandle().passenger == null;
+    }
+
+    public boolean eject() {
+        if (getHandle().passenger == null) {
+            return false;
+        }
+
+        getHandle().passenger.setPassengerOf(null);
+        return true;
+    }
 }

src/main/java/org/bukkit/craftbukkit/entity/CraftVehicle.java

@@ -1,7 +1,6 @@
 package org.bukkit.craftbukkit.entity;
 
 import org.bukkit.craftbukkit.CraftServer;
-import org.bukkit.entity.Entity;
 import org.bukkit.entity.Vehicle;
 
 /**
@@ -14,32 +13,6 @@ public abstract class CraftVehicle extends CraftEntity implements Vehicle {
         super(server, entity);
     }
 
-    public Entity getPassenger() {
-        return isEmpty() ? null : (getHandle().passenger.getBukkitEntity());
-    }
-
-    public boolean setPassenger(Entity passenger) {
-        if (passenger instanceof CraftEntity){
-            ((CraftEntity)passenger).getHandle().setPassengerOf(getHandle());
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-    public boolean isEmpty() {
-        return getHandle().passenger == null;
-    }
-
-    public boolean eject() {
-        if (getHandle().passenger == null) {
-            return false;
-        }
-
-        getHandle().passenger.setPassengerOf(null);
-        return true;
-    }
-
     @Override
     public String toString() {
         return "CraftVehicle{passenger=" + getPassenger() + '}';