diff --git a/src/org/jetbrains/jet/j2k/ast/AnonymousClass.kt b/src/org/jetbrains/jet/j2k/ast/AnonymousClass.kt
index de9c2f787f8..a2995a87743 100644
--- a/src/org/jetbrains/jet/j2k/ast/AnonymousClass.kt
+++ b/src/org/jetbrains/jet/j2k/ast/AnonymousClass.kt
@@ -8,7 +8,7 @@ import java.util.List
 public open class AnonymousClass(converter : Converter, members : List<Member>)
                                  : Class(converter,
                                          IdentifierImpl("anonClass"),
-                                         Collections.emptySet<String?>()!!,
+                                         Collections.emptySet<String>()!!,
                                          Collections.emptyList<Element>()!!,
                                          Collections.emptyList<Type>()!!,
                                          Collections.emptyList<Expression>()!!,
diff --git a/src/org/jetbrains/jet/j2k/ast/Class.kt b/src/org/jetbrains/jet/j2k/ast/Class.kt
index b57b116746f..2c802fe9908 100644
--- a/src/org/jetbrains/jet/j2k/ast/Class.kt
+++ b/src/org/jetbrains/jet/j2k/ast/Class.kt
@@ -15,7 +15,7 @@ import java.util.ArrayList
 
 public open class Class(converter : Converter,
                         val name : Identifier,
-                        modifiers : Set<String?>,
+                        modifiers : Set<String>,
                         val typeParameters : List<Element>,
                         val extendsTypes : List<Type>,
                         val baseClassParams : List<Expression>,
@@ -63,7 +63,7 @@ public open class Class(converter : Converter,
     }
 
     private fun constructorToInit(f: Function): Function {
-        val modifiers : Set<String?> = HashSet<String?>(f.getModifiers())
+        val modifiers : Set<String> = HashSet<String>(f.getModifiers())
         modifiers.add(Modifier.STATIC)
         val statements : List<Statement?> = f.block?.getStatements() ?: arrayList()
         statements.add(ReturnStatement(IdentifierImpl("__")))
diff --git a/src/org/jetbrains/jet/j2k/ast/Constructor.kt b/src/org/jetbrains/jet/j2k/ast/Constructor.kt
index 5515c532578..78331dbf4c2 100644
--- a/src/org/jetbrains/jet/j2k/ast/Constructor.kt
+++ b/src/org/jetbrains/jet/j2k/ast/Constructor.kt
@@ -6,7 +6,7 @@ import org.jetbrains.jet.j2k.ast.INode.Kind
 import org.jetbrains.jet.j2k.ast.types.Type
 
 public open class Constructor(identifier : Identifier,
-                              modifiers : Set<String?>,
+                              modifiers : Set<String>,
                               `type` : Type,
                               typeParameters : List<Element>,
                               params : Element,
diff --git a/src/org/jetbrains/jet/j2k/ast/Enum.kt b/src/org/jetbrains/jet/j2k/ast/Enum.kt
index f03e11578fd..fef0b38cc7f 100644
--- a/src/org/jetbrains/jet/j2k/ast/Enum.kt
+++ b/src/org/jetbrains/jet/j2k/ast/Enum.kt
@@ -8,7 +8,7 @@ import java.util.Set
 
 public open class Enum(converter : Converter,
                        name : Identifier,
-                       modifiers : Set<String?>,
+                       modifiers : Set<String>,
                        typeParameters : List<Element>,
                        extendsTypes : List<Type>,
                        baseClassParams : List<Expression>,
diff --git a/src/org/jetbrains/jet/j2k/ast/EnumConstant.kt b/src/org/jetbrains/jet/j2k/ast/EnumConstant.kt
index c88c6809112..bd20a39e5cb 100644
--- a/src/org/jetbrains/jet/j2k/ast/EnumConstant.kt
+++ b/src/org/jetbrains/jet/j2k/ast/EnumConstant.kt
@@ -4,7 +4,7 @@ import org.jetbrains.jet.j2k.ast.types.Type
 import java.util.Set
 
 public open class EnumConstant(identifier : Identifier,
-                               modifiers : Set<String?>,
+                               modifiers : Set<String>,
                                `type` : Type,
                                params : Element) : Field(identifier, modifiers, `type`.convertedToNotNull(), params, 0) {
 
diff --git a/src/org/jetbrains/jet/j2k/ast/Field.kt b/src/org/jetbrains/jet/j2k/ast/Field.kt
index 9464f67ca28..c676c1ea1af 100644
--- a/src/org/jetbrains/jet/j2k/ast/Field.kt
+++ b/src/org/jetbrains/jet/j2k/ast/Field.kt
@@ -8,7 +8,7 @@ import java.util.Set
 import org.jetbrains.jet.j2k.Converter.getDefaultInitializer
 
 public open class Field(val identifier : Identifier,
-                        modifiers : Set<String?>,
+                        modifiers : Set<String>,
                         val `type` : Type,
                         val initializer : Element,
                         val writingAccesses : Int) : Member(modifiers) {
diff --git a/src/org/jetbrains/jet/j2k/ast/Function.kt b/src/org/jetbrains/jet/j2k/ast/Function.kt
index c0f9ef5b845..b8d27809c19 100644
--- a/src/org/jetbrains/jet/j2k/ast/Function.kt
+++ b/src/org/jetbrains/jet/j2k/ast/Function.kt
@@ -7,7 +7,7 @@ import java.util.Set
 import org.jetbrains.jet.j2k.ast.types.Type
 
 public open class Function(val name : Identifier,
-                           modifiers : Set<String?>,
+                           modifiers : Set<String>,
                            val `type` : Type,
                            val typeParameters : List<Element>,
                            val params : Element,
diff --git a/src/org/jetbrains/jet/j2k/ast/Initializer.kt b/src/org/jetbrains/jet/j2k/ast/Initializer.kt
index 5aa73e0c338..ee2c6b8135a 100644
--- a/src/org/jetbrains/jet/j2k/ast/Initializer.kt
+++ b/src/org/jetbrains/jet/j2k/ast/Initializer.kt
@@ -2,7 +2,7 @@ package org.jetbrains.jet.j2k.ast
 
 import java.util.Set
 
-public open class Initializer(val block : Block, modifiers : Set<String?>) : Member(modifiers) {
+public open class Initializer(val block : Block, modifiers : Set<String>) : Member(modifiers) {
     public override fun toKotlin() : String {
         return block.toKotlin()
     }
diff --git a/src/org/jetbrains/jet/j2k/ast/Member.java b/src/org/jetbrains/jet/j2k/ast/Member.java
deleted file mode 100644
index 007d793cafe..00000000000
--- a/src/org/jetbrains/jet/j2k/ast/Member.java
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright 2010-2012 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.
- */
-
-package org.jetbrains.jet.j2k.ast;
-
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Set;
-
-/**
- * @author ignatov
- */
-public abstract class Member extends Node {
-    @NotNull protected Set<String> myModifiers;
-
-    protected Member(Set<String> modifiers) {
-        myModifiers = modifiers;
-    }
-
-    @NotNull
-    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
-    }
-
-    public boolean isAbstract() {
-        return myModifiers.contains(Modifier.ABSTRACT);
-    }
-
-    public boolean isStatic() {
-        return myModifiers.contains(Modifier.STATIC);
-    }
-
-    @NotNull
-    public Set<String> getModifiers() {
-        return myModifiers;
-    }
-}
diff --git a/src/org/jetbrains/jet/j2k/ast/Member.kt b/src/org/jetbrains/jet/j2k/ast/Member.kt
new file mode 100644
index 00000000000..809eed10c7a
--- /dev/null
+++ b/src/org/jetbrains/jet/j2k/ast/Member.kt
@@ -0,0 +1,13 @@
+package org.jetbrains.jet.j2k.ast
+
+import java.util.Set
+
+public abstract class Member(val myModifiers : Set<String>) : Node() {
+    open fun accessModifier() : String {
+        return myModifiers.find { m -> m == Modifier.PUBLIC || m == Modifier.PROTECTED || m == Modifier.PRIVATE } ?: ""
+    }
+
+    public open fun isAbstract() : Boolean = myModifiers.contains(Modifier.ABSTRACT)
+    public open fun isStatic() : Boolean = myModifiers.contains(Modifier.STATIC)
+    public open fun getModifiers() : Set<String> = myModifiers
+}
diff --git a/src/org/jetbrains/jet/j2k/ast/Trait.kt b/src/org/jetbrains/jet/j2k/ast/Trait.kt
index 5f1a111320d..8381ca0d93c 100644
--- a/src/org/jetbrains/jet/j2k/ast/Trait.kt
+++ b/src/org/jetbrains/jet/j2k/ast/Trait.kt
@@ -7,7 +7,7 @@ import java.util.Set
 
 public open class Trait(converter : Converter,
                         name : Identifier,
-                        modifiers : Set<String?>,
+                        modifiers : Set<String>,
                         typeParameters : List<Element>,
                         extendsTypes : List<Type>,
                         baseClassParams : List<Expression>,