Revert change to Appendable - much cleaner with StringBuilder

Author: Rob Harrop

src/com/rabbitmq/client/ContentHeader.java

@@ -38,5 +38,5 @@ public interface ContentHeader extends Cloneable {
      * A debugging utility - enable properties to be appended to a string buffer for use as trace messages.
      * @param buffer a place to append the properties as a string
      */
-    public void appendPropertyDebugStringTo(Appendable buffer);
+    public void appendPropertyDebugStringTo(StringBuilder buffer);
 }

src/com/rabbitmq/client/impl/AMQContentHeader.java

@@ -58,8 +58,8 @@ private void writeTo(DataOutputStream out, long bodySize) throws IOException {
     public abstract void writePropertiesTo(ContentHeaderPropertyWriter writer) throws IOException;
 
     /** Public API - {@inheritDoc} */
-    public void appendPropertyDebugStringTo(Appendable acc) {
-        try { acc.append("(?)"); } catch(IOException ioe) { }
+    public void appendPropertyDebugStringTo(StringBuilder acc) {
+        acc.append("(?)");
     }
 
     @Override public String toString() {

src/com/rabbitmq/client/impl/Method.java

@@ -63,8 +63,8 @@ public abstract class Method implements com.rabbitmq.client.Method {
      * Public API - debugging utility
      * @param buffer the buffer to append debug data to
      */
-    public void appendArgumentDebugStringTo(Appendable buffer) {
-        try { buffer.append("(?)");} catch(IOException ioe) { }
+    public void appendArgumentDebugStringTo(StringBuilder buffer) {
+        buffer.append("(?)");
     }
 
     @Override public String toString() {