diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineBlocks.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineBlocks.java
index 0a840939a..00fad28bf 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineBlocks.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineBlocks.java
@@ -30,6 +30,8 @@ import org.jetbrains.annotations.Nullable;
 
 public final class CraftEngineBlocks {
 
+    private CraftEngineBlocks() {}
+
     /**
      * Gets a custom block by ID
      *
diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineFurniture.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineFurniture.java
index fca21a6cc..a187386ab 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineFurniture.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineFurniture.java
@@ -25,7 +25,9 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
 
-public class CraftEngineFurniture {
+public final class CraftEngineFurniture {
+
+    private CraftEngineFurniture() {}
 
     /**
      * Gets custom furniture by ID
diff --git a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineItems.java b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineItems.java
index 1049ffafc..2203f6e5b 100644
--- a/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineItems.java
+++ b/bukkit/src/main/java/net/momirealms/craftengine/bukkit/api/CraftEngineItems.java
@@ -8,7 +8,9 @@ import org.bukkit.inventory.ItemStack;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-public class CraftEngineItems {
+public final class CraftEngineItems {
+
+    private CraftEngineItems() {}
 
     /**
      * Gets a custom item by ID