TIKA-4531: remove leaky / dead / not needed code, fix javadoc

Author: THausherr

tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/ooxml/AbstractOOXMLExtractor.java

@@ -72,7 +72,7 @@
 
 /**
  * Base class for all Tika OOXML extractors.
- * <p/>
+ * <p>
  * Tika extractors decorate POI extractors so that the parsed content of
  * documents is returned as a sequence of XHTML SAX events. Subclasses must
  * implement the buildXHTML method {@link #buildXHTML(XHTMLContentHandler)} that
@@ -332,9 +332,8 @@ private void handleEmbeddedOLE(PackagePart part, XHTMLContentHandler xhtml, Stri
             return;
         }
 
-        InputStream is = part.getInputStream();
         // Open the POIFS (OLE2) structure and process
-        POIFSFileSystem fs = null;
+        POIFSFileSystem fs;
         try {
             fs = new POIFSFileSystem(part.getInputStream());
         } catch (Exception e) {
@@ -401,9 +400,7 @@ private void handleEmbeddedOLE(PackagePart part, XHTMLContentHandler xhtml, Stri
         } catch (IOException e) {
             EmbeddedDocumentUtil.recordEmbeddedStreamException(e, parentMetadata);
         } finally {
-            if (fs != null) {
-                fs.close();
-            }
+            fs.close();
             if (stream != null) {
                 stream.close();
             }