use StringBuilder rather than StringBuffer

git-svn-id: https://svn.apache.org/repos/asf/maven/doxia/doxia-tools/trunk@1438393 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/maven/doxia/linkcheck/validation/HTTPLinkValidationResult.java b/src/main/java/org/apache/maven/doxia/linkcheck/validation/HTTPLinkValidationResult.java
index fe1aba4..687df00 100644
--- a/src/main/java/org/apache/maven/doxia/linkcheck/validation/HTTPLinkValidationResult.java
+++ b/src/main/java/org/apache/maven/doxia/linkcheck/validation/HTTPLinkValidationResult.java
@@ -83,7 +83,7 @@
     /** {@inheritDoc} */
     public String toString()
     {
-        StringBuffer sb = new StringBuffer( super.toString() );
+        StringBuilder sb = new StringBuilder( super.toString() );
 
         sb.append( '\n' );
         sb.append( "httpStatusCode=" ).append( this.httpStatusCode );
diff --git a/src/main/java/org/apache/maven/doxia/linkcheck/validation/LinkValidationResult.java b/src/main/java/org/apache/maven/doxia/linkcheck/validation/LinkValidationResult.java
index 2a95831..928dec8 100644
--- a/src/main/java/org/apache/maven/doxia/linkcheck/validation/LinkValidationResult.java
+++ b/src/main/java/org/apache/maven/doxia/linkcheck/validation/LinkValidationResult.java
@@ -96,7 +96,7 @@
     /** {@inheritDoc} */
     public String toString()
     {
-        StringBuffer sb = new StringBuffer();
+        StringBuilder sb = new StringBuilder();
 
         sb.append( "persistent=" ).append( this.persistent ).append( '\n' );
         sb.append( "status=" ).append( this.status ).append( '\n' );