diff --git a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/AbstractFileSystemAccess.java b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/AbstractFileSystemAccess.java
index dd7bf143a..a57d94370 100644
--- a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/AbstractFileSystemAccess.java
+++ b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/AbstractFileSystemAccess.java
@@ -9,7 +9,6 @@ package org.eclipse.xtext.generator;
 
 import static com.google.common.collect.Maps.*;
 
-import java.io.InputStream;
 import java.util.Map;
 
 import org.eclipse.emf.common.util.URI;
@@ -21,7 +20,7 @@ import com.google.inject.Inject;
  * @author Sven Efftinge - Initial contribution and API
  */
 public abstract class AbstractFileSystemAccess implements IFileSystemAccess, IFileSystemAccessExtension,
-		IFileSystemAccessExtension2, IFileSystemAccessExtension3 {
+		IFileSystemAccessExtension2 {
 
 	@Inject(optional = true)
 	private IFilePostProcessor postProcessor;
@@ -76,27 +75,6 @@ public abstract class AbstractFileSystemAccess implements IFileSystemAccess, IFi
 		generateFile(fileName, DEFAULT_OUTPUT, contents);
 	}
 
-	/**
-	 * @since 2.4
-	 */
-	public void generateFile(String fileName, InputStream content) {
-		generateFile(fileName, DEFAULT_OUTPUT, content);
-	}
-
-	/**
-	 * @since 2.4
-	 */
-	public InputStream readBinaryFile(String fileName) {
-		return readBinaryFile(fileName, DEFAULT_OUTPUT);
-	}
-
-	/**
-	 * @since 2.4
-	 */
-	public CharSequence readTextFile(String fileName) {
-		return readTextFile(fileName, DEFAULT_OUTPUT);
-	}
-
 	/**
 	 * @since 2.1
 	 */
diff --git a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/AbstractFileSystemAccess2.java b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/AbstractFileSystemAccess2.java
new file mode 100644
index 000000000..b9d2cfc70
--- /dev/null
+++ b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/AbstractFileSystemAccess2.java
@@ -0,0 +1,43 @@
+/*******************************************************************************
+ * Copyright (c) 2013 itemis AG (http://www.itemis.eu) and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *******************************************************************************/
+package org.eclipse.xtext.generator;
+
+import java.io.InputStream;
+
+/**
+ * 
+ * Abstract base class for file system access supporting {@link IFileSystemAccessExtension3}.
+ * 
+ * @author Sven Efftinge - Initial contribution and API
+ * @since 2.4
+ */
+public abstract class AbstractFileSystemAccess2 extends AbstractFileSystemAccess implements IFileSystemAccessExtension3{
+
+	/**
+	 * @since 2.4
+	 */
+	public void generateFile(String fileName, InputStream content) {
+		generateFile(fileName, DEFAULT_OUTPUT, content);
+	}
+
+	/**
+	 * @since 2.4
+	 */
+	public InputStream readBinaryFile(String fileName) {
+		return readBinaryFile(fileName, DEFAULT_OUTPUT);
+	}
+
+	/**
+	 * @since 2.4
+	 */
+	public CharSequence readTextFile(String fileName) {
+		return readTextFile(fileName, DEFAULT_OUTPUT);
+	}
+
+	
+}
diff --git a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/InMemoryFileSystemAccess.java b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/InMemoryFileSystemAccess.java
index 021fc7846..6cc720515 100644
--- a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/InMemoryFileSystemAccess.java
+++ b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/InMemoryFileSystemAccess.java
@@ -25,7 +25,7 @@ import com.google.common.io.ByteStreams;
  * @author Moritz Eysholdt
  * @since 2.0
  */
-public class InMemoryFileSystemAccess extends AbstractFileSystemAccess {
+public class InMemoryFileSystemAccess extends AbstractFileSystemAccess2 {
 
 	private Map<String, Object> files = newTreeMap(); // the TreeMap sorts all files by name
 
diff --git a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/JavaIoFileSystemAccess.java b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/JavaIoFileSystemAccess.java
index b20e33e3b..3d9fe7080 100644
--- a/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/JavaIoFileSystemAccess.java
+++ b/plugins/org.eclipse.xtext/src/org/eclipse/xtext/generator/JavaIoFileSystemAccess.java
@@ -36,7 +36,7 @@ import com.google.inject.Inject;
  * @author Jan Koehnlein
  * @author Moritz Eysholdt
  */
-public class JavaIoFileSystemAccess extends AbstractFileSystemAccess {
+public class JavaIoFileSystemAccess extends AbstractFileSystemAccess2 {
 
 	@Inject
 	private IEncodingProvider encodingProvider;