--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java	Thu Jul 19 12:55:45 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/ChartGenerator.java	Thu Jul 19 12:59:56 2012 +0000
@@ -53,6 +53,7 @@
 import org.jfree.chart.axis.NumberAxis;
 import org.jfree.chart.plot.XYPlot;
 import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
+import org.jfree.chart.title.TextTitle;
 import org.jfree.data.Range;
 import org.jfree.data.general.Series;
 import org.jfree.data.xy.XYDataset;
@@ -570,13 +571,21 @@
 
 
     /**
-     * This method should be used by concrete subclasses to add subtitle to
-     * <i>chart</i>. <b>The method in this implementation is empty</b>.
+     * This method retrieves the chart subtitle by calling getChartSubtitle()
+     * and adds it as TextTitle to the chart.
+     * The default implementation of getChartSubtitle() returns the same
+     * as getDefaultChartSubtitle() which must be implemented by derived
+     * classes. If you want to add multiple subtitles to the chart override
+     * this method and add your subtitles manually.
      *
      * @param chart The JFreeChart chart object.
      */
     protected void addSubtitles(JFreeChart chart) {
-        // do nothing
+        String subtitle = getChartSubtitle();
+
+        if (subtitle != null && subtitle.length() > 0) {
+            chart.addSubtitle(new TextTitle(subtitle));
+        }
     }