change error handling in restclient

Author: B0SKAMP

dataregistry/src/main/java/org/fairdatapipeline/dataregistry/restclient/RegistryVersionException.java

@@ -0,0 +1,23 @@
+package org.fairdatapipeline.dataregistry.restclient;
+
+/** HTTP 406 Not Acceptable: registry rejects our Accept: version header. */
+public class RegistryVersionException extends RuntimeException {
+  /**
+   * Constructor
+   *
+   * @param message The error message.
+   */
+  public RegistryVersionException(String message) {
+    super(message);
+  }
+
+  /**
+   * Constructor
+   *
+   * @param message The error message.
+   * @param e The Exception that caused it.
+   */
+  public RegistryVersionException(String message, Exception e) {
+    super(message, e);
+  }
+}