diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterBottler.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterBottler.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterBottler.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterBottler.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterDecomposer.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterDecomposer.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterDecomposer.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterDecomposer.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterBottler.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterBottler.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterBottler.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterBottler.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterCapacitorBank.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterCapacitorBank.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterCapacitorBank.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterCapacitorBank.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterPanel.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterPanel.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterPanel.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterPanel.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterReplicator.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterReplicator.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterReplicator.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterReplicator.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterScanner.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterScanner.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterScanner.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityMatterScanner.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityPatternStorage.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityPatternStorage.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/entity/BlockEntityPatternStorage.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/entity/BlockEntityPatternStorage.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/client/screen/MatterBottlerScreen.java b/src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatterBottlerScreen.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/client/screen/MatterBottlerScreen.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/client/screen/MatterBottlerScreen.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/menu/MatterBottlerMenu.java b/src/main/kotlin/ru/dbotthepony/mc/otm/menu/MatterBottlerMenu.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/menu/MatterBottlerMenu.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/menu/MatterBottlerMenu.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/menu/MatterCapacitorBankMenu.java b/src/main/kotlin/ru/dbotthepony/mc/otm/menu/MatterCapacitorBankMenu.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/menu/MatterCapacitorBankMenu.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/menu/MatterCapacitorBankMenu.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/menu/MatterPanelMenu.java b/src/main/kotlin/ru/dbotthepony/mc/otm/menu/MatterPanelMenu.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/menu/MatterPanelMenu.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/menu/MatterPanelMenu.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/menu/PatternStorageMenu.java b/src/main/kotlin/ru/dbotthepony/mc/otm/menu/PatternStorageMenu.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/menu/PatternStorageMenu.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/menu/PatternStorageMenu.kt