fix potential input resource leaks (LGTM)

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1859591 13f79535-47bb-0310-9956-ffa450edef68

src/examples/src/org/apache/poi/hssf/usermodel/examples/EmbeddedObjects.java

@@ -33,8 +33,11 @@ import org.apache.poi.poifs.filesystem.POIFSFileSystem;
 public class EmbeddedObjects {
     @SuppressWarnings("unused")
     public static void main(String[] args) throws Exception {
-        POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(args[0]));
-        try (HSSFWorkbook workbook = new HSSFWorkbook(fs)) {
+        try (
+            FileInputStream fis = new FileInputStream(args[0]);
+            POIFSFileSystem fs = new POIFSFileSystem(fis);
+            HSSFWorkbook workbook = new HSSFWorkbook(fs)
+        ) {
             for (HSSFObjectData obj : workbook.getAllEmbeddedObjects()) {
                 //the OLE2 Class Name of the object
                 String oleName = obj.getOLE2ClassName();

src/java/org/apache/poi/poifs/dev/POIFSLister.java

@@ -68,9 +68,11 @@ public class POIFSLister {
    }
 
    public static void viewFileOld(final String filename, boolean withSizes) throws IOException {
-      POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(filename));
-      displayDirectory(fs.getRoot(), "", withSizes);
-      fs.close();
+      try (FileInputStream fis = new FileInputStream(filename)) {
+         POIFSFileSystem fs = new POIFSFileSystem(fis);
+         displayDirectory(fs.getRoot(), "", withSizes);
+         fs.close();
+      }
    }
 
    public static void displayDirectory(DirectoryNode dir, String indent, boolean withSizes) {
@@ -92,7 +94,7 @@ public class POIFSLister {
                name = name.substring(1) + " <" + altname + ">";
             }
             if (withSizes) {
-               size = " [" + doc.getSize() + " / 0x" + 
+               size = " [" + doc.getSize() + " / 0x" +
                       Integer.toHexString(doc.getSize()) + "]";
             }
             System.out.println(newIndent + name + size);

src/scratchpad/src/org/apache/poi/hdgf/extractor/VisioTextExtractor.java

@@ -60,7 +60,7 @@ public final class VisioTextExtractor extends POIOLE2TextExtractor {
 	/**
 	 * Locates all the text entries in the file, and returns their
 	 *  contents.
-	 * 
+	 *
 	 * @return An array of each Text item in the document
 	 */
 	public String[] getAllText() {
@@ -106,7 +106,7 @@ public final class VisioTextExtractor extends POIOLE2TextExtractor {
 	 * Returns the textual contents of the file.
 	 * Each textual object's text will be separated
 	 *  by a newline
-	 *  
+	 *
 	 * @return All text contained in this document, separated by <code>\n</code>
 	 */
 	@Override
@@ -128,12 +128,14 @@ public final class VisioTextExtractor extends POIOLE2TextExtractor {
 			System.exit(1);
 		}
 
-		VisioTextExtractor extractor =
-			new VisioTextExtractor(new FileInputStream(args[0]));
+		try (FileInputStream fis = new FileInputStream(args[0])) {
+			VisioTextExtractor extractor =
+				new VisioTextExtractor(fis);
 
-		// Print not PrintLn as already has \n added to it
-		System.out.print(extractor.getText());
-		
-		extractor.close();
+			// Print not PrintLn as already has \n added to it
+			System.out.print(extractor.getText());
+
+			extractor.close();
+		}
 	}
 }

src/scratchpad/src/org/apache/poi/hpbf/dev/PLCDumper.java

@@ -53,12 +53,13 @@ public final class PLCDumper {
 			System.err.println("  PLCDumper <filename>");
 			System.exit(1);
 		}
-		PLCDumper dump = new PLCDumper(
-				new FileInputStream(args[0])
-		);
 
-		System.out.println("Dumping " + args[0]);
-		dump.dumpPLC();
+		try (FileInputStream fis = new FileInputStream(args[0])) {
+			PLCDumper dump = new PLCDumper(fis);
+
+			System.out.println("Dumping " + args[0]);
+			dump.dumpPLC();
+		}
 	}
 
 	private void dumpPLC() {