close OPCPackage if there is an exception

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1872453 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xssf/usermodel/XSSFWorkbook.java

@@ -301,7 +301,7 @@ public class XSSFWorkbook extends POIXMLDocument implements Workbook, Date1904Su
      *       OPCPackage pkg = OPCPackage.open(path);
      *       XSSFWorkbook wb = new XSSFWorkbook(pkg);
      *       // work with the wb object
-     *       ......
+     *       ......XWPFDocument
      *       pkg.close(); // gracefully closes the underlying zip file
      *   </code></pre>
      */

src/ooxml/java/org/apache/poi/xwpf/usermodel/XWPFDocument.java

@@ -154,8 +154,9 @@ public class XWPFDocument extends POIXMLDocument implements Document, IBody {
      * Create a new WordProcessingML package and setup the default minimal content
      */
     protected static OPCPackage newPackage() {
+        OPCPackage pkg = null;
         try {
-            OPCPackage pkg = OPCPackage.create(new ByteArrayOutputStream());    // NOSONAR - we do not want to close this here
+            pkg = OPCPackage.create(new ByteArrayOutputStream());    // NOSONAR - we do not want to close this here
             // Main part
             PackagePartName corePartName = PackagingURIHelper.createPartName(XWPFRelation.DOCUMENT.getDefaultFileName());
             // Create main part relationship
@@ -167,6 +168,7 @@ public class XWPFDocument extends POIXMLDocument implements Document, IBody {
 
             return pkg;
         } catch (Exception e) {
+            IOUtils.closeQuietly(pkg);
             throw new POIXMLException(e);
         }
     }