diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/BlockMattery.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMattery.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/BlockMattery.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMattery.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMattery.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMattery.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMattery.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMattery.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatteryPowered.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatteryPowered.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatteryPowered.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatteryPowered.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/RedstoneSetting.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/RedstoneSetting.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/RedstoneSetting.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/RedstoneSetting.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/container/MatteryContainer.java b/src/main/kotlin/ru/dbotthepony/mc/otm/container/MatteryContainer.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/container/MatteryContainer.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/container/MatteryContainer.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/container/MatteryContainerHandler.java b/src/main/kotlin/ru/dbotthepony/mc/otm/container/MatteryContainerHandler.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/container/MatteryContainerHandler.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/container/MatteryContainerHandler.kt