Fixes #340
diff --git a/src/main/java/com/fasterxml/jackson/core/json/WriterBasedJsonGenerator.java b/src/main/java/com/fasterxml/jackson/core/json/WriterBasedJsonGenerator.java
index 180497a..fb83bc2 100644
--- a/src/main/java/com/fasterxml/jackson/core/json/WriterBasedJsonGenerator.java
+++ b/src/main/java/com/fasterxml/jackson/core/json/WriterBasedJsonGenerator.java
@@ -11,7 +11,7 @@
  * {@link JsonGenerator} that outputs JSON content using a {@link java.io.Writer}
  * which handles character encoding.
  */
-public final class WriterBasedJsonGenerator
+public class WriterBasedJsonGenerator
     extends JsonGeneratorImpl
 {
     final protected static int SHORT_WRITE = 32;