change to Java 5 compatible

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@780534 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/commons/math/ode/nonstiff/AdamsIntegrator.java

@@ -633,9 +633,13 @@ public class AdamsIntegrator extends MultistepIntegrator {
             }
 
         } catch (NoSuchFieldException nsfe) {
-            throw new IOException(nsfe);
+            IOException ioe = new IOException();
+            ioe.initCause(nsfe);
+            throw ioe;
         } catch (IllegalAccessException iae) {
-            throw new IOException(iae);
+            IOException ioe = new IOException();
+            ioe.initCause(iae);
+            throw ioe;
         }
 
     }