Index: lucene/core/src/java/org/apache/lucene/analysis/CharReader.java
===================================================================
--- lucene/core/src/java/org/apache/lucene/analysis/CharReader.java	(revision 1326494)
+++ lucene/core/src/java/org/apache/lucene/analysis/CharReader.java	(working copy)
@@ -55,6 +55,11 @@
   }
 
   @Override
+  public int read() throws IOException {
+    return input.read();
+  }
+
+  @Override
   public boolean markSupported(){
     return input.markSupported();
   }
Index: modules/analysis/common/src/java/org/apache/lucene/analysis/charfilter/CharFilter.java
===================================================================
--- modules/analysis/common/src/java/org/apache/lucene/analysis/charfilter/CharFilter.java	(revision 1326494)
+++ modules/analysis/common/src/java/org/apache/lucene/analysis/charfilter/CharFilter.java	(working copy)
@@ -66,6 +66,11 @@
   }
 
   @Override
+  public int read() throws IOException {
+    return input.read();
+  }
+
+  @Override
   public boolean markSupported(){
     return input.markSupported();
   }
Index: modules/analysis/common/src/test/org/apache/lucene/analysis/core/TestRandomChains.java
===================================================================
--- modules/analysis/common/src/test/org/apache/lucene/analysis/core/TestRandomChains.java	(revision 1326494)
+++ modules/analysis/common/src/test/org/apache/lucene/analysis/core/TestRandomChains.java	(working copy)
@@ -756,77 +756,32 @@
     }
   }
   
-  // wants charfilter to be a filterreader...
-  // do *NOT* refactor me to be a charfilter: LUCENE-3990
-  static class CheckThatYouDidntReadAnythingReaderWrapper extends CharStream {
-    boolean readSomething;
-    CharStream in;
+  static final class CheckThatYouDidntReadAnythingReaderWrapper extends CharFilter {
+    boolean readSomething = false;
     
     CheckThatYouDidntReadAnythingReaderWrapper(Reader in) {
-      this.in = CharReader.get(in);
+      super(CharReader.get(in));
     }
-    
-    @Override
-    public int correctOffset(int currentOff) {
-      return in.correctOffset(currentOff);
-    }
 
     @Override
-    public void close() throws IOException {
-      in.close();
-    }
-
-    @Override
     public int read(char[] cbuf, int off, int len) throws IOException {
       readSomething = true;
-      return in.read(cbuf, off, len);
+      return super.read(cbuf, off, len);
     }
 
     @Override
     public int read() throws IOException {
       readSomething = true;
-      return in.read();
+      return super.read();
     }
 
     @Override
-    public int read(CharBuffer target) throws IOException {
-      readSomething = true;
-      return in.read(target);
-    }
-
-    @Override
-    public void mark(int readAheadLimit) throws IOException {
-      in.mark(readAheadLimit);
-    }
-
-    @Override
-    public boolean markSupported() {
-      return in.markSupported();
-    }
-
-    @Override
-    public int read(char[] cbuf) throws IOException {
-      readSomething = true;
-      return in.read(cbuf);
-    }
-
-    @Override
-    public boolean ready() throws IOException {
-      return in.ready();
-    }
-
-    @Override
-    public void reset() throws IOException {
-      in.reset();
-    }
-
-    @Override
     public long skip(long n) throws IOException {
       readSomething = true;
-      return in.skip(n);
+      return super.skip(n);
     }
   }
-
+  
   static class TokenizerSpec {
     Tokenizer tokenizer;
     String toString;