diff --git a/platform/util/base/src/com/intellij/util/containers/FileCollectionFactory.java b/platform/util/base/src/com/intellij/util/containers/FileCollectionFactory.kt
similarity index 100%
rename from platform/util/base/src/com/intellij/util/containers/FileCollectionFactory.java
rename to platform/util/base/src/com/intellij/util/containers/FileCollectionFactory.kt