3 files changed, 24 insertions, 3 deletions
diff --git a/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AbsoluteAxisAlgorithm.java b/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AbsoluteAxisAlgorithm.java
index 234484c..3e8bc04 100644
--- a/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AbsoluteAxisAlgorithm.java
+++ b/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AbsoluteAxisAlgorithm.java
@@ -3,14 +3,21 @@
  */
 package at.gv.egiz.pdfas.api.sign.pos.axis;
 
+import java.io.Serializable;
+
 /**
  * An absolute positioned element.
  * @author wprinz
  */
-public class AbsoluteAxisAlgorithm extends AxisAlgorithm
+public class AbsoluteAxisAlgorithm extends AxisAlgorithm implements Serializable
 {
 
   /**
+    * 
+    */
+   private static final long serialVersionUID = 1L;
+   
+  /**
    * The absolute positioning value on the axis.
    */
   protected float absoluteValue = 0.0f;
diff --git a/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AutoAxisAlgorithm.java b/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AutoAxisAlgorithm.java
index 4c5459f..0d1f80d 100644
--- a/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AutoAxisAlgorithm.java
+++ b/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AutoAxisAlgorithm.java
@@ -3,12 +3,19 @@
  */
 package at.gv.egiz.pdfas.api.sign.pos.axis;
 
+import java.io.Serializable;
+
 /**
  * Auto positioning for this element.
  * 
  * @author wprinz
  */
-public class AutoAxisAlgorithm extends AxisAlgorithm
+public class AutoAxisAlgorithm extends AxisAlgorithm implements Serializable
 {
+
+   /**
+    * 
+    */
+   private static final long serialVersionUID = 1L;
 // empty
 }
diff --git a/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AxisAlgorithm.java b/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AxisAlgorithm.java
index a4baac6..40f614d 100644
--- a/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AxisAlgorithm.java
+++ b/src/main/java/at/gv/egiz/pdfas/api/sign/pos/axis/AxisAlgorithm.java
@@ -3,12 +3,19 @@
  */
 package at.gv.egiz.pdfas.api.sign.pos.axis;
 
+import java.io.Serializable;
+
 /**
  * Determines how a certain position is chosen on the axis (x, y, width).
  * 
  * @author wprinz
  */
-public abstract class AxisAlgorithm
+public abstract class AxisAlgorithm implements Serializable
 {
+
+   /**
+    * 
+    */
+   private static final long serialVersionUID = 1L;
 // base class
 }