diff --git a/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetChangeSignatureData.java b/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetChangeSignatureData.kt
similarity index 100%
rename from idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetChangeSignatureData.java
rename to idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetChangeSignatureData.kt
diff --git a/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetMethodDescriptor.java b/idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetMethodDescriptor.kt
similarity index 100%
rename from idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetMethodDescriptor.java
rename to idea/src/org/jetbrains/jet/plugin/refactoring/changeSignature/JetMethodDescriptor.kt