diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterCapacitorBank.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterCapacitorBank.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterCapacitorBank.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterCapacitorBank.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterPanel.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterPanel.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/BlockMatterPanel.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockMatterPanel.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/block/BlockPatternStorage.java b/src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockPatternStorage.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/block/BlockPatternStorage.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/block/BlockPatternStorage.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/menu/BatteryBankMenu.java b/src/main/kotlin/ru/dbotthepony/mc/otm/menu/MenuBatteryBank.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/menu/BatteryBankMenu.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/menu/MenuBatteryBank.kt
diff --git a/src/main/java/ru/dbotthepony/mc/otm/menu/MatterDecomposerMenu.java b/src/main/kotlin/ru/dbotthepony/mc/otm/menu/MenuMatterDecomposer.kt
similarity index 100%
rename from src/main/java/ru/dbotthepony/mc/otm/menu/MatterDecomposerMenu.java
rename to src/main/kotlin/ru/dbotthepony/mc/otm/menu/MenuMatterDecomposer.kt