diff --git a/idea/idea-jvm/src/org/jetbrains/kotlin/idea/compiler/KotlinCompilerManager.kt b/idea/idea-jvm/src/org/jetbrains/kotlin/idea/compiler/KotlinCompilerManager.kt
index 7bdeb86784b..6482dc65b0e 100644
--- a/idea/idea-jvm/src/org/jetbrains/kotlin/idea/compiler/KotlinCompilerManager.kt
+++ b/idea/idea-jvm/src/org/jetbrains/kotlin/idea/compiler/KotlinCompilerManager.kt
@@ -13,102 +13,86 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+package org.jetbrains.kotlin.idea.compiler
 
-package org.jetbrains.kotlin.idea.compiler;
+import com.intellij.diagnostic.PluginException
+import com.intellij.ide.plugins.PluginManagerCore
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.compiler.CompilationStatusListener
+import com.intellij.openapi.compiler.CompileContext
+import com.intellij.openapi.compiler.CompilerManager
+import com.intellij.openapi.compiler.CompilerMessageCategory
+import com.intellij.openapi.components.ProjectComponent
+import com.intellij.openapi.diagnostic.Logger
+import com.intellij.openapi.project.Project
+import com.intellij.openapi.util.io.FileUtilRt
+import com.intellij.openapi.vfs.LocalFileSystem
+import com.intellij.util.containers.ContainerUtil
+import org.jetbrains.kotlin.config.CompilerRunnerConstants
+import org.jetbrains.kotlin.idea.KotlinFileType
+import org.jetbrains.kotlin.js.JavaScript
+import java.io.PrintStream
+import java.io.PrintWriter
 
-import com.intellij.diagnostic.PluginException;
-import com.intellij.ide.plugins.PluginManagerCore;
-import com.intellij.openapi.application.ApplicationManager;
-import com.intellij.openapi.compiler.*;
-import com.intellij.openapi.components.ProjectComponent;
-import com.intellij.openapi.diagnostic.Logger;
-import com.intellij.openapi.project.Project;
-import com.intellij.openapi.util.io.FileUtilRt;
-import com.intellij.openapi.vfs.LocalFileSystem;
-import com.intellij.openapi.vfs.VirtualFile;
-import com.intellij.util.containers.ContainerUtil;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.kotlin.idea.KotlinFileType;
-import org.jetbrains.kotlin.js.JavaScript;
+class KotlinCompilerManager(project: Project, manager: CompilerManager) : ProjectComponent {
+    // Extending PluginException ensures that Exception Analyzer recognizes this as a Kotlin exception
+    private class KotlinCompilerException(private val text: String) :
+        PluginException("", PluginManagerCore.getPluginByClassName(KotlinCompilerManager::class.java.name)) {
+        override fun printStackTrace(s: PrintWriter) {
+            s.print(text)
+        }
 
-import java.io.PrintStream;
-import java.io.PrintWriter;
-import java.util.Set;
+        override fun printStackTrace(s: PrintStream) {
+            s.print(text)
+        }
 
-import static org.jetbrains.kotlin.config.CompilerRunnerConstants.INTERNAL_ERROR_PREFIX;
-import static org.jetbrains.kotlin.config.CompilerRunnerConstants.KOTLIN_COMPILER_NAME;
+        @Synchronized
+        override fun fillInStackTrace(): Throwable {
+            return this
+        }
 
-public class KotlinCompilerManager implements ProjectComponent {
-    private static final Logger LOG = Logger.getInstance(KotlinCompilerManager.class);
+        override fun getStackTrace(): Array<StackTraceElement> {
+            LOG.error("Somebody called getStackTrace() on KotlinCompilerException")
+            // Return some stack trace that originates in Kotlin
+            return UnsupportedOperationException().stackTrace
+        }
 
-    // Comes from external make
-    private static final String PREFIX_WITH_COMPILER_NAME = KOTLIN_COMPILER_NAME + ": " + INTERNAL_ERROR_PREFIX;
-    private static final Set<String> FILE_EXTS_WHICH_NEEDS_REFRESH = ContainerUtil.immutableSet(JavaScript.DOT_EXTENSION, ".map");
+        override val message: String
+            get() = "<Exception from standalone Kotlin compiler>"
 
-    public KotlinCompilerManager(Project project, CompilerManager manager) {
-        manager.addCompilableFileType(KotlinFileType.INSTANCE);
-        manager.addCompilationStatusListener(new CompilationStatusListener() {
-            @Override
-            public void compilationFinished(boolean aborted, int errors, int warnings, CompileContext compileContext) {
-                for (CompilerMessage error : compileContext.getMessages(CompilerMessageCategory.ERROR)) {
-                    String message = error.getMessage();
-                    if (message.startsWith(INTERNAL_ERROR_PREFIX) || message.startsWith(PREFIX_WITH_COMPILER_NAME)) {
-                        LOG.error(new KotlinCompilerException(message));
+    }
+
+    companion object {
+        private val LOG = Logger.getInstance(KotlinCompilerManager::class.java)
+
+        // Comes from external make
+        private const val PREFIX_WITH_COMPILER_NAME =
+            CompilerRunnerConstants.KOTLIN_COMPILER_NAME + ": " + CompilerRunnerConstants.INTERNAL_ERROR_PREFIX
+        private val FILE_EXTS_WHICH_NEEDS_REFRESH = ContainerUtil.immutableSet(JavaScript.DOT_EXTENSION, ".map")
+    }
+
+    init {
+        manager.addCompilableFileType(KotlinFileType.INSTANCE)
+        manager.addCompilationStatusListener(object : CompilationStatusListener {
+            override fun compilationFinished(aborted: Boolean, errors: Int, warnings: Int, compileContext: CompileContext) {
+                for (error in compileContext.getMessages(CompilerMessageCategory.ERROR)) {
+                    val message = error.message
+                    if (message.startsWith(CompilerRunnerConstants.INTERNAL_ERROR_PREFIX) || message.startsWith(PREFIX_WITH_COMPILER_NAME)) {
+                        LOG.error(KotlinCompilerException(message))
                     }
                 }
             }
 
-            @Override
-            public void fileGenerated(String outputRoot, String relativePath) {
-                if (ApplicationManager.getApplication().isUnitTestMode()) return;
-
-                String ext = FileUtilRt.getExtension(relativePath).toLowerCase();
-
+            override fun fileGenerated(outputRoot: String, relativePath: String) {
+                if (ApplicationManager.getApplication().isUnitTestMode) return
+                val ext = FileUtilRt.getExtension(relativePath).toLowerCase()
                 if (FILE_EXTS_WHICH_NEEDS_REFRESH.contains(ext)) {
-                    String outFile = outputRoot + "/" + relativePath;
-                    VirtualFile virtualFile = LocalFileSystem.getInstance().findFileByPath(outFile);
-                    assert virtualFile != null : "Virtual file not found for generated file path: " + outFile;
-                    virtualFile.refresh(/*async =*/ false, /*recursive =*/ false);
+                    val outFile = "$outputRoot/$relativePath"
+                    val virtualFile = LocalFileSystem.getInstance().findFileByPath(outFile)
+                        ?: error("Virtual file not found for generated file path: $outFile")
+                    virtualFile.refresh( /*async =*/false,  /*recursive =*/false)
                 }
             }
-        }, project);
+        }, project)
     }
-
-    // Extending PluginException ensures that Exception Analyzer recognizes this as a Kotlin exception
-    private static class KotlinCompilerException extends PluginException {
-        private final String text;
-
-        public KotlinCompilerException(String text) {
-            super("", PluginManagerCore.getPluginByClassName(KotlinCompilerManager.class.getName()));
-            this.text = text;
-        }
-
-        @Override
-        public void printStackTrace(PrintWriter s) {
-            s.print(text);
-        }
-
-        @Override
-        public void printStackTrace(@NotNull PrintStream s) {
-            s.print(text);
-        }
-
-        @NotNull
-        @Override
-        public synchronized Throwable fillInStackTrace() {
-            return this;
-        }
-
-        @Override
-        public StackTraceElement[] getStackTrace() {
-            LOG.error("Somebody called getStackTrace() on KotlinCompilerException");
-            // Return some stack trace that originates in Kotlin
-            return new UnsupportedOperationException().getStackTrace();
-        }
-
-        @Override
-        public String getMessage() {
-            return "<Exception from standalone Kotlin compiler>";
-        }
-    }
-}
+}
\ No newline at end of file