diff --git a/java/java-psi-impl/src/com/intellij/core/CoreJavaPsiImplementationHelper.java b/java/java-psi-impl/src/com/intellij/core/CoreJavaPsiImplementationHelper.java
new file mode 100644
index 000000000000..0407bc285e35
--- /dev/null
+++ b/java/java-psi-impl/src/com/intellij/core/CoreJavaPsiImplementationHelper.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2000-2011 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 com.intellij.core;
+
+import com.intellij.lang.ASTNode;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.pom.java.LanguageLevel;
+import com.intellij.psi.*;
+import com.intellij.psi.impl.JavaPsiImplementationHelper;
+
+/**
+ * @author yole
+ */
+public class CoreJavaPsiImplementationHelper extends JavaPsiImplementationHelper {
+  @Override
+  public PsiClass getOriginalClass(PsiClass psiClass) {
+    return psiClass;
+  }
+
+  @Override
+  public PsiElement getClsFileNavigationElement(PsiJavaFile clsFile) {
+    return clsFile;
+  }
+
+  @Override
+  public LanguageLevel getClassesLanguageLevel(VirtualFile virtualFile) {
+    return null;
+  }
+
+  @Override
+  public ASTNode getDefaultImportAnchor(PsiImportList list, PsiImportStatementBase statement) {
+    throw new UnsupportedOperationException("TODO");
+  }
+
+  @Override
+  public PsiElement getDefaultMemberAnchor(PsiClass psiClass, PsiMember firstPsi) {
+    throw new UnsupportedOperationException("TODO");
+  }
+
+  @Override
+  public void setupCatchBlock(String exceptionName, PsiElement context, PsiCatchSection element) {
+    throw new UnsupportedOperationException("TODO");
+  }
+}
diff --git a/java/java-psi-impl/src/com/intellij/core/JavaCoreEnvironment.java b/java/java-psi-impl/src/com/intellij/core/JavaCoreEnvironment.java
index 285533fae0e4..a6a0dcc9db22 100644
--- a/java/java-psi-impl/src/com/intellij/core/JavaCoreEnvironment.java
+++ b/java/java-psi-impl/src/com/intellij/core/JavaCoreEnvironment.java
@@ -22,6 +22,7 @@ import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.*;
 import com.intellij.psi.impl.EmptySubstitutorImpl;
 import com.intellij.psi.impl.JavaPsiFacadeImpl;
+import com.intellij.psi.impl.JavaPsiImplementationHelper;
 import com.intellij.psi.impl.PsiElementFactoryImpl;
 import com.intellij.psi.impl.compiled.ClassFileStubBuilder;
 import com.intellij.psi.impl.compiled.ClsStubBuilderFactory;
@@ -52,6 +53,7 @@ public class JavaCoreEnvironment extends CoreEnvironment {
                               javaPsiFacade);
     myProject.registerService(JavaPsiFacade.class, javaPsiFacade);
     myProject.registerService(PsiElementFactory.class, new PsiElementFactoryImpl(myPsiManager));
+    myProject.registerService(JavaPsiImplementationHelper.class, new CoreJavaPsiImplementationHelper());
 
     myApplication.registerService(EmptySubstitutor.class, new EmptySubstitutorImpl());
   }