diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterReplicator.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterReplicator.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterReplicator.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterReplicator.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterScanner.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterScanner.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterScanner.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterScanner.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/worker/BlockEntityMatteryWorker.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/worker/BlockEntityMatteryWorker.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/worker/BlockEntityMatteryWorker.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/worker/BlockEntityMatteryWorker.kt