Use final.

Author: Gary Gregory

src/main/java/org/apache/commons/io/file/spi/FileSystemProviders.java

@@ -60,7 +60,7 @@ public static FileSystemProviders installed() {
     /*
      * Might make public later.
      */
-    private FileSystemProviders(List<FileSystemProvider> providers) {
+    private FileSystemProviders(final List<FileSystemProvider> providers) {
         super();
         this.providers = providers;
     }

src/test/java/org/apache/commons/io/file/spi/FileSystemProvidersTest.java

@@ -37,7 +37,7 @@ public class FileSystemProvidersTest {
     @Test
     public void testGetFileSystemProvider_all() throws URISyntaxException {
         final List<FileSystemProvider> installedProviders = FileSystemProvider.installedProviders();
-        for (FileSystemProvider fileSystemProvider : installedProviders) {
+        for (final FileSystemProvider fileSystemProvider : installedProviders) {
             final String scheme = fileSystemProvider.getScheme();
             final URI uri = new URI(scheme, "ssp", "fragment");
             assertEquals(scheme, FileSystemProviders.installed().getFileSystemProvider(uri).getScheme());

src/test/java/org/apache/commons/io/input/ReversedLinesFileReaderTestParamFile.java

@@ -49,8 +49,8 @@ public class ReversedLinesFileReaderTestParamFile {
 
     public static Stream<Arguments> testDataIntegrityWithBufferedReader() throws IOException, URISyntaxException {
         // Make a file using the default encoding.
-        Path sourcePath = TestResources.getPath("test-file-utf8-win-linebr.bin");
-        Path targetPath = Files.createTempFile("ReversedLinesFileReaderTestParamFile", ".bin");
+        final Path sourcePath = TestResources.getPath("test-file-utf8-win-linebr.bin");
+        final Path targetPath = Files.createTempFile("ReversedLinesFileReaderTestParamFile", ".bin");
         try (Reader input = Files.newBufferedReader(sourcePath, StandardCharsets.UTF_8);
                 Writer output = Files.newBufferedWriter(targetPath, Charset.defaultCharset())) {
             IOUtils.copyLarge(input, output);