xmerge: Avoid a possible null pointer exception

Change-Id: Ib6ce07aef1ae27f4e5db376667617432de9f41ef
Reviewed-on: https://gerrit.libreoffice.org/10686Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>

xmerge/source/xmerge/java/org/openoffice/xmerge/converter/dom/DOMDocument.java

@@ -182,17 +182,11 @@ public class DOMDocument
      */
     public void read(InputStream is) throws IOException {
      Debug.log(Debug.INFO, "reading file");
-        DocumentBuilder builder = null;
         try {
-            builder = factory.newDocumentBuilder();
+            DocumentBuilder builder = factory.newDocumentBuilder();
+            contentDoc = builder.parse(is);
         } catch (ParserConfigurationException ex) {
         System.out.println("Error:"+ ex);
-        }
-    try {
-
-        contentDoc=  builder.parse(is);
-
-
         } catch (SAXException ex) {
         System.out.println("Error:"+ ex);
         }
@@ -371,20 +365,14 @@ public class DOMDocument
         Document doc = null;
 
         try {
-
             DocumentBuilder builder = factory.newDocumentBuilder();
             doc = builder.newDocument();
-
+            Element root = doc.createElement(rootName);
+            doc.appendChild(root);
         } catch (ParserConfigurationException ex) {
              System.out.println("Error:"+ ex);
-
-
         }
 
-        Element root = doc.createElement(rootName);
-        doc.appendChild(root);
-
-
         return doc;
     }
 

xmerge/source/xmerge/java/org/openoffice/xmerge/util/ActiveSyncDriver.java

@@ -81,14 +81,15 @@ public class ActiveSyncDriver {
          * Because they can be installed separately, though, the MIME types need
          * to be check to see which one to load.
          */
-        File pluginJar = null;
-        if (srcMime.equals("staroffice/sxw") || srcMime.equals("application/x-pocket-word"))
-        {
+        File pluginJar;
+        if (srcMime.equals("staroffice/sxw") || srcMime.equals("application/x-pocket-word")) {
             pluginJar = new File(ooClassDir + "pocketWord.jar");
-        }
-        else if (srcMime.equals("staroffice/sxc") || srcMime.equals("application/x-pocket-excel"))
-        {
+        } else {
+            if (srcMime.equals("staroffice/sxc") || srcMime.equals("application/x-pocket-excel")) {
                 pluginJar = new File(ooClassDir + "pexcel.jar");
+            } else {
+                return false;
+            }
         }
 
         ConverterInfoReader cirPlugin = new ConverterInfoReader(pluginJar.toURI().toURL().toString(), false);