Minor formatting and neatness changes.

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitBlockRegistry.java

@@ -62,7 +62,14 @@ public class BukkitBlockRegistry extends BundledBlockRegistry {
 
         @Override
         public boolean isAir() {
-            return material == Material.AIR || material == Material.CAVE_AIR || material == Material.VOID_AIR;
+            switch (material) {
+                case AIR:
+                case CAVE_AIR:
+                case VOID_AIR:
+                    return true;
+                default:
+                    return false;
+            }
         }
 
         @Override

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitEntityProperties.java

@@ -22,9 +22,9 @@ package com.sk89q.worldedit.bukkit;
 import static com.google.common.base.Preconditions.checkNotNull;
 
 import com.sk89q.worldedit.entity.metadata.EntityProperties;
-import com.sk89q.worldedit.util.Enums;
 import org.bukkit.entity.Ambient;
 import org.bukkit.entity.Animals;
+import org.bukkit.entity.ArmorStand;
 import org.bukkit.entity.Boat;
 import org.bukkit.entity.ComplexEntityPart;
 import org.bukkit.entity.Entity;
@@ -46,9 +46,6 @@ import org.bukkit.entity.minecart.ExplosiveMinecart;
 
 class BukkitEntityProperties implements EntityProperties {
 
-    private static final org.bukkit.entity.EntityType armorStandType =
-            Enums.findByValue(org.bukkit.entity.EntityType.class, "ARMOR_STAND");
-
     private final Entity entity;
 
     BukkitEntityProperties(Entity entity) {
@@ -143,7 +140,7 @@ class BukkitEntityProperties implements EntityProperties {
 
     @Override
     public boolean isArmorStand() {
-        return entity.getType() == armorStandType;
+        return entity instanceof ArmorStand;
     }
 
     @Override

worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/BukkitPlayerBlockBag.java

@@ -26,7 +26,6 @@ import com.sk89q.worldedit.extent.inventory.OutOfBlocksException;
 import com.sk89q.worldedit.extent.inventory.OutOfSpaceException;
 import com.sk89q.worldedit.util.Location;
 import com.sk89q.worldedit.world.block.BlockState;
-import com.sk89q.worldedit.world.block.BlockTypes;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;