diff --git a/plugins/git4idea/src/git4idea/checkin/GitCheckinEnvironment.java b/plugins/git4idea/src/git4idea/checkin/GitCheckinEnvironment.kt
similarity index 100%
rename from plugins/git4idea/src/git4idea/checkin/GitCheckinEnvironment.java
rename to plugins/git4idea/src/git4idea/checkin/GitCheckinEnvironment.kt