findbugs-reported bug squashing; 959 bugs left (findbugs 1.3.9)

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@1036179 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 8 insertions, 0 deletions

diff --git a/src/java/org/apache/fop/area/Trait.java b/src/java/org/apache/fop/area/Trait.java
index 42c5462e4..4ad03b468 100644
--- a/src/java/org/apache/fop/area/Trait.java
+++ b/src/java/org/apache/fop/area/Trait.java
@@ -36,6 +36,8 @@ import org.apache.fop.util.ColorUtil;
  */
 public final class Trait implements Serializable {
 
+    private static final long serialVersionUID = 3234280285391611437L;
+
     private Trait() {
     }
 
@@ -313,6 +315,8 @@ public final class Trait implements Serializable {
      */
     public static class InternalLink implements Serializable {
 
+        private static final long serialVersionUID = -8993505060996723039L;
+
         /** The unique key of the PageViewport. */
         private String pvKey;
 
@@ -447,6 +451,8 @@ public final class Trait implements Serializable {
      */
     public static class ExternalLink implements Serializable {
 
+        private static final long serialVersionUID = -3720707599232620946L;
+
         private String destination;
         private boolean newWindow;
 
@@ -520,6 +526,8 @@ public final class Trait implements Serializable {
      */
     public static class Background implements Serializable {
 
+        private static final long serialVersionUID = 8452078676273242870L;
+
         /** The background color if any. */
         private Color color = null;