CID#1326472, CID#1326473, CID#1326474 use try/finalize

Coverity requires that closeable objects (use of new) call .close(),

git commit 5a29db7a
implemented a series of .close etc calls, update to
use a single try{}finalize{} instead.

Change-Id: Iadc9de13d6a0af4b0aaca2dfdd0e2d0940a5223d
Reviewed-on: https://gerrit.libreoffice.org/19807Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>

xmerge/source/bridge/java/XMergeBridge.java

@@ -375,6 +375,9 @@ public class XMergeBridge {
             XInputStreamToInputStreamAdapter xis =new XInputStreamToInputStreamAdapter(xml);
 
             XOutputStreamToOutputStreamAdapter newxos =new XOutputStreamToOutputStreamAdapter(device);
+
+            /* make sure newxos and xis get closed */
+            try{
                 try{
                     ConverterInfoReader cir = new ConverterInfoReader(jarName,false);
                     ciEnum =cir.getConverterInfoEnumeration();
@@ -417,6 +420,7 @@ public class XMergeBridge {
 
                                 newxos.flush();
                                 newxos.close();
+                                newxos = null;
 
                                 int i=1;
                                 while (docEnum.hasNext() && sURL.startsWith("file:")) {
@@ -437,7 +441,6 @@ public class XMergeBridge {
                                     docOut.write(fos);
                                     fos.flush();
                                     fos.close();
-                                fos = null;
                                     i++;
 
                                 }
@@ -447,12 +450,6 @@ public class XMergeBridge {
                         ConverterInfoMgr.removeByJar(jarName);
                     }
                     catch (Exception ex1) {
-                    /* Satisfy coverity */
-                    newxos.flush();
-                    newxos.close();
-                    newxos = null;
-                    xis.close();
-                    xis    = null;
                         IOException ex2 = new IOException();
                         ex2.initCause(ex1);
                         throw ex2;
@@ -480,6 +477,7 @@ public class XMergeBridge {
                                 docIn.write(newxos,false);
                             }
                             newxos.close();
+                            newxos = null;
                         }
                         ConverterInfoMgr.removeByJar(jarName);
                     }
@@ -487,24 +485,20 @@ public class XMergeBridge {
                         System.out.println("\nERROR : Stack Overflow. \n Increase of the JRE by adding the following line to the end of the javarc file \n \"-Xss1m\"\n");
                     }
                     catch (Exception ex1) {
-                    /* Satisfy coverity */
-                    newxos.flush();
-                    newxos.close();
-                    newxos = null;
-                    xis.close();
-                    xis    = null;
                         IOException ex2 = new IOException();
                         ex2.initCause(ex1);
                         throw ex2;
                     }
 
                 }
-            /* Satisfy coverity */
+            }
+            finally{
+                if (newxos != null){
                     newxos.flush();
                     newxos.close();
-            newxos = null;
+                }
                 xis.close();
-            xis    = null;
+            }
         }
 
         private String getPath(URI uri){