diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/BaseKotlinCompilerSettings.java b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/BaseKotlinCompilerSettings.kt
similarity index 100%
rename from idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/BaseKotlinCompilerSettings.java
rename to idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/BaseKotlinCompilerSettings.kt
diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCommonCompilerArgumentsHolder.java b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCommonCompilerArgumentsHolder.kt
similarity index 100%
rename from idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCommonCompilerArgumentsHolder.java
rename to idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCommonCompilerArgumentsHolder.kt
diff --git a/idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCompilerSettings.java b/idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCompilerSettings.kt
similarity index 100%
rename from idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCompilerSettings.java
rename to idea/idea-analysis/src/org/jetbrains/kotlin/idea/compiler/configuration/KotlinCompilerSettings.kt
diff --git a/idea/src/org/jetbrains/kotlin/idea/compiler/configuration/Kotlin2JsCompilerArgumentsHolder.java b/idea/src/org/jetbrains/kotlin/idea/compiler/configuration/Kotlin2JsCompilerArgumentsHolder.kt
similarity index 100%
rename from idea/src/org/jetbrains/kotlin/idea/compiler/configuration/Kotlin2JsCompilerArgumentsHolder.java
rename to idea/src/org/jetbrains/kotlin/idea/compiler/configuration/Kotlin2JsCompilerArgumentsHolder.kt
diff --git a/idea/src/org/jetbrains/kotlin/idea/compiler/configuration/Kotlin2JvmCompilerArgumentsHolder.java b/idea/src/org/jetbrains/kotlin/idea/compiler/configuration/Kotlin2JvmCompilerArgumentsHolder.kt
similarity index 100%
rename from idea/src/org/jetbrains/kotlin/idea/compiler/configuration/Kotlin2JvmCompilerArgumentsHolder.java
rename to idea/src/org/jetbrains/kotlin/idea/compiler/configuration/Kotlin2JvmCompilerArgumentsHolder.kt