diff --git a/idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyBrowser.java b/idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyBrowser.kt
similarity index 100%
rename from idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyBrowser.java
rename to idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyBrowser.kt
diff --git a/idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyNodeDescriptor.java b/idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyNodeDescriptor.kt
similarity index 100%
rename from idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyNodeDescriptor.java
rename to idea/src/org/jetbrains/kotlin/idea/hierarchy/calls/KotlinCallHierarchyNodeDescriptor.kt