diff --git a/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Diagnostic.java b/compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Diagnostic.kt
similarity index 100%
rename from compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Diagnostic.java
rename to compiler/frontend/src/org/jetbrains/kotlin/diagnostics/Diagnostic.kt