diff --git a/app/src/main/java/com/ea/ironmonkey/BitmapGraphics.java b/app/src/main/java/com/ea/ironmonkey/BitmapGraphics.kt
similarity index 100%
rename from app/src/main/java/com/ea/ironmonkey/BitmapGraphics.java
rename to app/src/main/java/com/ea/ironmonkey/BitmapGraphics.kt
diff --git a/app/src/main/java/com/ea/ironmonkey/DrawFrameListener.java b/app/src/main/java/com/ea/ironmonkey/DrawFrameListener.kt
similarity index 100%
rename from app/src/main/java/com/ea/ironmonkey/DrawFrameListener.java
rename to app/src/main/java/com/ea/ironmonkey/DrawFrameListener.kt
diff --git a/app/src/main/java/com/ea/ironmonkey/RunLoop.java b/app/src/main/java/com/ea/ironmonkey/RunLoop.kt
similarity index 100%
rename from app/src/main/java/com/ea/ironmonkey/RunLoop.java
rename to app/src/main/java/com/ea/ironmonkey/RunLoop.kt