diff --git a/src/main/java/ru/dbotthepony/mc/otm/item/ItemBattery.java b/src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemBattery.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/item/ItemBattery.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemBattery.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/item/ItemGravitationalDisruptor.java b/src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemGravitationalDisruptor.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/item/ItemGravitationalDisruptor.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemGravitationalDisruptor.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/item/ItemMatterCapacitor.java b/src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemMatterCapacitor.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/item/ItemMatterCapacitor.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemMatterCapacitor.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/item/ItemPatternStorage.java b/src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemPatternStorage.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/item/ItemPatternStorage.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemPatternStorage.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/item/ItemPortableCondensationDrive.java b/src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemPortableCondensationDrive.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/item/ItemPortableCondensationDrive.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/item/ItemPortableCondensationDrive.kt