diff --git a/compiler/frontend/src/org/jetbrains/kotlin/psi/JetClass.java b/compiler/frontend/src/org/jetbrains/kotlin/psi/JetClass.kt
similarity index 100%
rename from compiler/frontend/src/org/jetbrains/kotlin/psi/JetClass.java
rename to compiler/frontend/src/org/jetbrains/kotlin/psi/JetClass.kt
diff --git a/compiler/frontend/src/org/jetbrains/kotlin/psi/JetClassOrObject.java b/compiler/frontend/src/org/jetbrains/kotlin/psi/JetClassOrObject.kt
similarity index 100%
rename from compiler/frontend/src/org/jetbrains/kotlin/psi/JetClassOrObject.java
rename to compiler/frontend/src/org/jetbrains/kotlin/psi/JetClassOrObject.kt
diff --git a/compiler/frontend/src/org/jetbrains/kotlin/psi/JetObjectDeclaration.java b/compiler/frontend/src/org/jetbrains/kotlin/psi/JetObjectDeclaration.kt
similarity index 100%
rename from compiler/frontend/src/org/jetbrains/kotlin/psi/JetObjectDeclaration.java
rename to compiler/frontend/src/org/jetbrains/kotlin/psi/JetObjectDeclaration.kt