diff --git a/src/org/jetbrains/jet/j2k/Converter.java b/src/org/jetbrains/jet/j2k/Converter.java
index a38dda7620e..ba7b24d3bd6 100644
--- a/src/org/jetbrains/jet/j2k/Converter.java
+++ b/src/org/jetbrains/jet/j2k/Converter.java
@@ -41,6 +41,7 @@ public class Converter {
 
   private static Class classToClass(PsiClass psiClass) {
     final List<Function> methods = methodsToFunctionList(psiClass.getMethods(), true);
+    final Set<String> modifiers = modifiersListToModifiersSet(psiClass.getModifierList());
     final List<Class> innerClasses = classesToClassList(psiClass.getAllInnerClasses());
     final List<Field> fields = fieldsToFieldList(psiClass.getAllFields());
     final List<Element> typeParameters = elementsToElementList(psiClass.getTypeParameters());
@@ -53,10 +54,10 @@ public class Converter {
 
     final IdentifierImpl name = new IdentifierImpl(psiClass.getName());
     if (psiClass.isInterface())
-      return new Trait(name, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
+      return new Trait(name, modifiers, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
     if (psiClass.isEnum())
-      return new Enum(name, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
-    return new Class(name, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
+      return new Enum(name, modifiers, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
+    return new Class(name, modifiers, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
   }
 
   private static List<Field> fieldsToFieldList(PsiField[] fields) {
diff --git a/src/org/jetbrains/jet/j2k/ast/Class.java b/src/org/jetbrains/jet/j2k/ast/Class.java
index 24f7fc63bd5..4a9ca601c05 100644
--- a/src/org/jetbrains/jet/j2k/ast/Class.java
+++ b/src/org/jetbrains/jet/j2k/ast/Class.java
@@ -5,6 +5,7 @@ import org.jetbrains.jet.j2k.util.AstUtil;
 
 import java.util.LinkedList;
 import java.util.List;
+import java.util.Set;
 
 /**
  * @author ignatov
@@ -12,6 +13,7 @@ import java.util.List;
 public class Class extends Node {
   String TYPE = "class";
   final Identifier myName;
+  private Set<String> myModifiers;
   private final List<Element> myTypeParameters;
   private final List<Type> myExtendsTypes;
   private final List<Type> myImplementsTypes;
@@ -19,8 +21,10 @@ public class Class extends Node {
   final List<Function> myMethods;
   final List<Field> myFields;
 
-  public Class(Identifier name, List<Element> typeParameters, List<Type> extendsTypes, List<Type> implementsTypes, List<Class> innerClasses, List<Function> methods, List<Field> fields) {
+  public Class(Identifier name, Set<String> modifiers, List<Element> typeParameters, List<Type> extendsTypes,
+               List<Type> implementsTypes, List<Class> innerClasses, List<Function> methods, List<Field> fields) {
     myName = name;
+    myModifiers = modifiers;
     myTypeParameters = typeParameters;
     myExtendsTypes = extendsTypes;
     myImplementsTypes = implementsTypes;
@@ -70,10 +74,36 @@ public class Class extends Node {
     return allTypes.size() == 0 ? EMPTY : SPACE + COLON + SPACE + AstUtil.joinNodes(allTypes, COMMA_WITH_SPACE);
   }
 
+  private String accessModifier() {
+    for (String m : myModifiers)
+      if (m.equals(Modifier.PUBLIC) || m.equals(Modifier.PROTECTED) || m.equals(Modifier.PRIVATE))
+        return m;
+    return EMPTY; // package local converted to internal, but we use internal by default
+  }
+
+  String modifiersToKotlin() {
+    List<String> modifierList = new LinkedList<String>();
+
+    modifierList.add(accessModifier());
+
+    if (needOpenModifier())
+      modifierList.add(Modifier.OPEN);
+
+    if (modifierList.size() > 0)
+      return AstUtil.join(modifierList, SPACE) + SPACE;
+
+    return EMPTY;
+  }
+
+  boolean needOpenModifier() {
+    return getKind() != Kind.TRAIT && !myModifiers.contains(Modifier.FINAL);
+  }
+
+
   @NotNull
   @Override
   public String toKotlin() {
-    return TYPE + SPACE + myName.toKotlin() + typeParametersToKotlin() +
+    return modifiersToKotlin() + TYPE + SPACE + myName.toKotlin() + typeParametersToKotlin() +
       implementTypesToKotlin() +
       typeParameterWhereToKotlin() +
       SPACE + "{" + N +
diff --git a/src/org/jetbrains/jet/j2k/ast/Enum.java b/src/org/jetbrains/jet/j2k/ast/Enum.java
index dd6db4da722..6a0fd5a3524 100644
--- a/src/org/jetbrains/jet/j2k/ast/Enum.java
+++ b/src/org/jetbrains/jet/j2k/ast/Enum.java
@@ -5,13 +5,14 @@ import org.jetbrains.annotations.Nullable;
 import org.jetbrains.jet.j2k.util.AstUtil;
 
 import java.util.List;
+import java.util.Set;
 
 /**
  * @author ignatov
  */
 public class Enum extends Class {
-  public Enum(Identifier name, List<Element> typeParameters, List<Type> extendsTypes, List<Type> implementsTypes, List<Class> innerClasses, List<Function> methods, List<Field> fields) {
-    super(name, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
+  public Enum(Identifier name, Set<String> modifiers, List<Element> typeParameters, List<Type> extendsTypes, List<Type> implementsTypes, List<Class> innerClasses, List<Function> methods, List<Field> fields) {
+    super(name, modifiers, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
   }
 
   @Nullable
@@ -29,11 +30,10 @@ public class Enum extends Class {
     return EMPTY;
   }
 
-
   @NotNull
   @Override
   public String toKotlin() {
-    return "enum" + SPACE + myName.toKotlin() + typeParametersToKotlin() + primaryConstructorToKotlin() + implementTypesToKotlin() + SPACE + "{" + N +
+    return modifiersToKotlin() + "enum" + SPACE + myName.toKotlin() + typeParametersToKotlin() + primaryConstructorToKotlin() + implementTypesToKotlin() + SPACE + "{" + N +
       AstUtil.joinNodes(myFields, N) + N +
       AstUtil.joinNodes(methodsExceptConstructors(), N) + N +
       AstUtil.joinNodes(myInnerClasses, N) + N +
diff --git a/src/org/jetbrains/jet/j2k/ast/INode.java b/src/org/jetbrains/jet/j2k/ast/INode.java
index e0f8323f77f..4cc77364390 100644
--- a/src/org/jetbrains/jet/j2k/ast/INode.java
+++ b/src/org/jetbrains/jet/j2k/ast/INode.java
@@ -13,6 +13,6 @@ public interface INode {
   public Kind getKind();
 
   public enum Kind {
-    UNDEFINED, TYPE, CONSTRUCTOR, BREAK, CONTINUE, VARARG,
+    UNDEFINED, TYPE, CONSTRUCTOR, BREAK, CONTINUE, VARARG, TRAIT,
   }
 }
diff --git a/src/org/jetbrains/jet/j2k/ast/Trait.java b/src/org/jetbrains/jet/j2k/ast/Trait.java
index 484f5dcbc93..4a357bbdd3e 100644
--- a/src/org/jetbrains/jet/j2k/ast/Trait.java
+++ b/src/org/jetbrains/jet/j2k/ast/Trait.java
@@ -1,13 +1,22 @@
 package org.jetbrains.jet.j2k.ast;
 
+import org.jetbrains.annotations.NotNull;
+
 import java.util.List;
+import java.util.Set;
 
 /**
  * @author ignatov
  */
 public class Trait extends Class {
-  public Trait(Identifier name, List<Element> typeParameters, List<Type> extendsTypes, List<Type> implementsTypes, List<Class> innerClasses, List<Function> methods, List<Field> fields) {
-    super(name, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
+  public Trait(Identifier name, Set<String> modifiers, List<Element> typeParameters, List<Type> extendsTypes, List<Type> implementsTypes, List<Class> innerClasses, List<Function> methods, List<Field> fields) {
+    super(name, modifiers, typeParameters, extendsTypes, implementsTypes, innerClasses, methods, fields);
     TYPE = "trait";
   }
+
+  @NotNull
+  @Override
+  public Kind getKind() {
+    return Kind.TRAIT;
+  }
 }
diff --git a/test/org/jetbrains/jet/j2k/FileTest.java b/test/org/jetbrains/jet/j2k/FileTest.java
index 8d5a8f6a92c..fe4d2d074f6 100644
--- a/test/org/jetbrains/jet/j2k/FileTest.java
+++ b/test/org/jetbrains/jet/j2k/FileTest.java
@@ -47,14 +47,21 @@ public class FileTest extends JetTestCaseBase {
 
   public void testPackageWithClass() throws Exception {
     Assert.assertEquals(
-      toSingleLine(fileToKotlin("package test; class C {}")),
+      toSingleLine(fileToKotlin("package test; final class C {}")),
       "namespace test { class C { } }"
     );
   }
 
+  public void testPackageWithOpenClass() throws Exception {
+    Assert.assertEquals(
+      toSingleLine(fileToKotlin("package test; class C {}")),
+      "namespace test { open class C { } }"
+    );
+  }
+
   public void testPackageWithClasses() throws Exception {
     Assert.assertEquals(
-      toSingleLine(fileToKotlin("class A {} class B {}")),
+      toSingleLine(fileToKotlin("final class A {} final class B {}")),
       "namespace { class A { } class B { } }");
   }
 }
diff --git a/test/org/jetbrains/jet/j2k/JetTestCaseBase.java b/test/org/jetbrains/jet/j2k/JetTestCaseBase.java
index e47ef7c7cf8..813c9de4000 100644
--- a/test/org/jetbrains/jet/j2k/JetTestCaseBase.java
+++ b/test/org/jetbrains/jet/j2k/JetTestCaseBase.java
@@ -93,7 +93,6 @@ public abstract class JetTestCaseBase extends LightDaemonAnalyzerTestCase {
     String result = prettify(Converter.fileToFile(javaFile).toKotlin()).replaceAll("namespace \\{", "");
     result = result.substring(0, result.lastIndexOf("}"));
     return prettify(result);
-
   }
 
   @NotNull
@@ -107,7 +106,7 @@ public abstract class JetTestCaseBase extends LightDaemonAnalyzerTestCase {
   }
 
   String methodToKotlin(String text) throws IOException {
-    String result = classToKotlin("class C {" + text + "}")
+    String result = classToKotlin("final class C {" + text + "}")
       .replaceAll("class C \\{", "");
     result = result.substring(0, result.lastIndexOf("}"));
     return prettify(result);
diff --git a/test/org/jetbrains/jet/j2k/ast/ClassTest.java b/test/org/jetbrains/jet/j2k/ast/ClassTest.java
index 61f49eae934..96b5efcfbb8 100644
--- a/test/org/jetbrains/jet/j2k/ast/ClassTest.java
+++ b/test/org/jetbrains/jet/j2k/ast/ClassTest.java
@@ -90,4 +90,28 @@ public class ClassTest extends JetTestCaseBase {
       "class A : Base, I0, I1, I2 { }"
     );
   }
+
+  public void testClass() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("class Test {}"), "open class Test { }");
+  }
+
+  public void testFinalClass() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("final class Test {}"), "class Test { }");
+  }
+
+  public void testPublicClass() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("public class Test {}"), "public open class Test { }");
+  }
+
+  public void testProtectedClass() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("protected class Test {}"), "protected open class Test { }");
+  }
+
+  public void testPivateClass() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("private class Test {}"), "private open class Test { }");
+  }
+
+  public void testInternalClass() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("class Test {}"), "open class Test { }");
+  }
 }
diff --git a/test/org/jetbrains/jet/j2k/ast/EnumTest.java b/test/org/jetbrains/jet/j2k/ast/EnumTest.java
index ee36bd1df0d..67ebb370101 100644
--- a/test/org/jetbrains/jet/j2k/ast/EnumTest.java
+++ b/test/org/jetbrains/jet/j2k/ast/EnumTest.java
@@ -91,6 +91,22 @@ public class EnumTest extends JetTestCaseBase {
     );
   }
 
+  public void testPublicEnum() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("public enum Test {}"), "public enum Test { }");
+  }
+
+  public void testProtectedEnum() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("protected enum Test {}"), "protected enum Test { }");
+  }
+
+  public void testPrivateEnum() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("private enum Test {}"), "private enum Test { }");
+  }
+
+  public void testInternalEnum() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("enum Test {}"), "enum Test { }");
+  }
+
 //  public void testTwoConstructors() throws Exception {
 //    Assert.assertEquals(
 //      classToKotlin(
diff --git a/test/org/jetbrains/jet/j2k/ast/TraitTest.java b/test/org/jetbrains/jet/j2k/ast/TraitTest.java
index 4e228eb53eb..4bdeb7b6b37 100644
--- a/test/org/jetbrains/jet/j2k/ast/TraitTest.java
+++ b/test/org/jetbrains/jet/j2k/ast/TraitTest.java
@@ -56,4 +56,20 @@ public class TraitTest extends JetTestCaseBase {
       "trait A : I0, I1, I2 { }"
     );
   }
-}
+
+  public void testPublicInterface() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("public interface Test {}"), "public trait Test { }");
+  }
+
+  public void testProtectedInterface() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("protected interface Test {}"), "protected trait Test { }");
+  }
+
+  public void testPrivateInterface() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("private interface Test {}"), "private trait Test { }");
+  }
+
+  public void testInternalInterface() throws Exception {
+    Assert.assertEquals(classToSingleLineKotlin("interface Test {}"), "trait Test { }");
+  }
+}
\ No newline at end of file