diff --git a/generators/test-generator/tests/org/jetbrains/kotlin/generators/util/GeneratorsFileUtil.kt b/generators/test-generator/tests/org/jetbrains/kotlin/generators/util/GeneratorsFileUtil.kt
index a6952d3c74e..c07b3099956 100644
--- a/generators/test-generator/tests/org/jetbrains/kotlin/generators/util/GeneratorsFileUtil.kt
+++ b/generators/test-generator/tests/org/jetbrains/kotlin/generators/util/GeneratorsFileUtil.kt
@@ -1,80 +1,54 @@
 /*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
+package org.jetbrains.kotlin.generators.util
 
-package org.jetbrains.kotlin.generators.util;
+import com.intellij.openapi.util.SystemInfo
+import com.intellij.openapi.util.text.StringUtil
+import org.jetbrains.kotlin.test.KotlinTestUtils
+import java.io.File
+import java.io.IOException
+import java.nio.file.Files
+import java.nio.file.StandardCopyOption
 
-import com.intellij.openapi.util.SystemInfo;
-import com.intellij.openapi.util.text.StringUtil;
-import kotlin.io.FilesKt;
-import kotlin.text.Charsets;
-import org.jetbrains.kotlin.test.KotlinTestUtils;
-
-import java.io.File;
-import java.io.IOException;
-import java.nio.file.Files;
-
-import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
-
-public class GeneratorsFileUtil {
-    @SuppressWarnings("UseOfSystemOutOrSystemErr")
-    public static void writeFileIfContentChanged(File file, String newText) throws IOException {
-        writeFileIfContentChanged(file, newText, true);
-    }
-
-    @SuppressWarnings("UseOfSystemOutOrSystemErr")
-    public static void writeFileIfContentChanged(File file, String newText, boolean logNotChanged) throws IOException {
-        File parentFile = file.getParentFile();
+object GeneratorsFileUtil {
+    @JvmStatic
+    @JvmOverloads
+    @Throws(IOException::class)
+    fun writeFileIfContentChanged(file: File, newText: String, logNotChanged: Boolean = true) {
+        val parentFile = file.parentFile
         if (!parentFile.exists()) {
             if (parentFile.mkdirs()) {
-                System.out.println("Directory created: " + parentFile.getAbsolutePath());
-            }
-            else {
-                throw new IllegalStateException("Cannot create directory: " + parentFile);
+                println("Directory created: " + parentFile.absolutePath)
+            } else {
+                throw IllegalStateException("Cannot create directory: $parentFile")
             }
         }
-
         if (checkFileIgnoringLineSeparators(file, newText)) {
             if (logNotChanged) {
-                System.out.println("Not changed: " + file.getAbsolutePath());
+                println("Not changed: " + file.absolutePath)
             }
-            return;
+            return
         }
-
-        boolean useTempFile = !SystemInfo.isWindows;
-
-        File tempFile = useTempFile ? new File(KotlinTestUtils.tmpDir(file.getName()), file.getName() + ".tmp") : file;
-
-        FilesKt.writeText(tempFile, newText, Charsets.UTF_8);
-        System.out.println("File written: " + tempFile.getAbsolutePath());
+        val useTempFile = !SystemInfo.isWindows
+        val tempFile =
+            if (useTempFile) File(KotlinTestUtils.tmpDir(file.name), file.name + ".tmp") else file
+        tempFile.writeText(newText, Charsets.UTF_8)
+        println("File written: " + tempFile.absolutePath)
         if (useTempFile) {
-            Files.move(tempFile.toPath(), file.toPath(), REPLACE_EXISTING);
-            System.out.println("Renamed " + tempFile + " to " + file);
+            Files.move(tempFile.toPath(), file.toPath(), StandardCopyOption.REPLACE_EXISTING)
+            println("Renamed $tempFile to $file")
         }
-        System.out.println();
+        println()
     }
 
-    private static boolean checkFileIgnoringLineSeparators(File file, String content) {
-        String currentContent;
-        try {
-            currentContent = StringUtil.convertLineSeparators(FilesKt.readText(file, Charsets.UTF_8));
+    private fun checkFileIgnoringLineSeparators(file: File, content: String): Boolean {
+        val currentContent: String = try {
+            StringUtil.convertLineSeparators(file.readText(Charsets.UTF_8))
+        } catch (ignored: Throwable) {
+            return false
         }
-        catch (Throwable ignored) {
-            return false;
-        }
-
-        return StringUtil.convertLineSeparators(content).equals(currentContent);
+        return StringUtil.convertLineSeparators(content) == currentContent
     }
-}
+}
\ No newline at end of file