Index: exectck/src/main/java/org/apache/jdo/exectck/Utilities.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- exectck/src/main/java/org/apache/jdo/exectck/Utilities.java	(revision 1866146)
+++ exectck/src/main/java/org/apache/jdo/exectck/Utilities.java	(date 1567177637000)
@@ -90,27 +90,38 @@
 
         //Get the System Classloader
         ClassLoader loader = ClassLoader.getSystemClassLoader();
-
-        //Get the URLs
-        URL[] urls = ((URLClassLoader) loader).getURLs();
-
-        for (int i = 0; i < urls.length; i++) {
-            System.out.println("    " + urls[i].getFile());
+        if(loader != null) {
+            printClasspath((URLClassLoader) loader);
+        }else {
+            throw new RuntimeException("System classloader is null");
         }
 
         //Get the System Classloader
         loader = Thread.currentThread().getContextClassLoader();
 
+
+        if(loader != null) {
+            //Get the URLs
+            printClasspath(loader);
+        }else{
+            throw new RuntimeException("Context classloader is null");
+        }
+
+    }
+
+    /**
+     * @param loader the loader is not null
+     */
+    private void printClasspath(URLClassLoader loader) {
         //Get the URLs
-        urls = ((URLClassLoader) loader).getURLs();
+        URL[] urls = loader.getURLs();
 
         for (int i = 0; i < urls.length; i++) {
             System.out.println("    " + urls[i].getFile());
         }
-
     }
 
- static String readFile( String fileName ) throws IOException {
+    static String readFile( String fileName ) throws IOException {
     BufferedReader reader = new BufferedReader( new FileReader (fileName));
     String line  = null;
     StringBuffer stringBuf = new StringBuffer();