Add test fo smack-xmlparser

mostly to make jacoco happy, but it can not hurt anyway :).

smack-xmlparser/src/test/java/org/jivesoftware/smack/xml/SmackXmlParserTest.java

@@ -0,0 +1,29 @@
+/**
+ *
+ * Copyright 2019 Florian Schmaus
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.jivesoftware.smack.xml;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+public class SmackXmlParserTest {
+
+    @Test
+    public void testSmackXmlParser() {
+        assertThrows(IllegalStateException.class, () -> SmackXmlParser.getXmlPullParserFactory());
+    }
+}