Make package private class final

Author: garydgregory

src/main/java/org/apache/commons/io/CloseableURLConnection.java

@@ -30,7 +30,7 @@
 /**
  * Delegates to a URLConnection while implementing AutoCloseable.
  */
-class CloseableURLConnection extends URLConnection implements AutoCloseable {
+final class CloseableURLConnection extends URLConnection implements AutoCloseable {
 
     static CloseableURLConnection open(final URI uri) throws IOException {
         return open(Objects.requireNonNull(uri, "uri").toURL());

src/main/java/org/apache/commons/io/IO.java

@@ -19,7 +19,7 @@
 /**
  * Component-wide operations on Apache Commons IO.
  */
-class IO {
+final class IO {
 
     /**
      * Clears any state, throughout Apache Commons IO. Handy for tests.

src/main/java/org/apache/commons/io/comparator/ReverseFileComparator.java

@@ -30,7 +30,7 @@
  *
  * @since 1.4
  */
-class ReverseFileComparator extends AbstractFileComparator implements Serializable {
+final class ReverseFileComparator extends AbstractFileComparator implements Serializable {
 
     private static final long serialVersionUID = -4808255005272229056L;
     private final Comparator<File> delegate;

src/main/java/org/apache/commons/io/function/UncheckedIOBaseStream.java

@@ -33,7 +33,7 @@
  * @param <S> the type of the IO stream extending {@code IOBaseStream}.
  * @param <B> the type of the stream extending {@code BaseStream}.
  */
-class UncheckedIOBaseStream<T, S extends IOBaseStream<T, S, B>, B extends BaseStream<T, B>> implements BaseStream<T, B> {
+final class UncheckedIOBaseStream<T, S extends IOBaseStream<T, S, B>, B extends BaseStream<T, B>> implements BaseStream<T, B> {
 
     private final S delegate;
 

src/main/java/org/apache/commons/io/input/ByteBufferCleaner.java

@@ -32,7 +32,7 @@
  * See <a href=https://bugs.openjdk.java.net/browse/JDK-4724038>JDK-4724038</a>
  * </p>
  */
-class ByteBufferCleaner {
+final class ByteBufferCleaner {
 
     private interface Cleaner {
         void clean(ByteBuffer buffer) throws ReflectiveOperationException;

src/main/java/org/apache/commons/io/input/UnsupportedOperationExceptions.java

@@ -24,7 +24,7 @@
  * TODO Consider making this public and use from LineIterator but this feels like it belongs in LANG rather than IO.
  * </p>
  */
-class UnsupportedOperationExceptions {
+final class UnsupportedOperationExceptions {
 
     private static final String MARK_RESET = "mark/reset";
 

src/main/java/org/apache/commons/io/monitor/SerializableFileTime.java

@@ -35,7 +35,7 @@
  * <em>Serialization is deprecated and will be removed in 3.0.</em>
  * </p>
  */
-class SerializableFileTime implements Serializable {
+final class SerializableFileTime implements Serializable {
 
     static final SerializableFileTime EPOCH = new SerializableFileTime(FileTimes.EPOCH);
 

src/main/java/org/apache/commons/io/output/UncheckedAppendableImpl.java

@@ -31,7 +31,7 @@
  * @see UncheckedIOException
  * @since 2.12.0
  */
-class UncheckedAppendableImpl implements UncheckedAppendable {
+final class UncheckedAppendableImpl implements UncheckedAppendable {
 
     private final Appendable appendable;
 

src/test/java/org/apache/commons/io/filefilter/AbstractIOFileFilterTest.java

@@ -24,7 +24,7 @@
 
 public abstract class AbstractIOFileFilterTest {
 
-    class TesterFalseFileFilter extends FalseFileFilter {
+    final class TesterFalseFileFilter extends FalseFileFilter {
 
         private static final long serialVersionUID = -3603047664010401872L;
         private boolean invoked;
@@ -54,7 +54,7 @@ public void setInvoked(final boolean invoked) {
         }
     }
 
-    class TesterTrueFileFilter extends TrueFileFilter {
+    final class TesterTrueFileFilter extends TrueFileFilter {
 
         private static final long serialVersionUID = 1828930358172422914L;
         private boolean invoked;

src/test/java/org/apache/commons/io/function/EraseTest.java

@@ -30,7 +30,7 @@
 /**
  * Tests {@code Erase}.
  */
-class EraseTest {
+final class EraseTest {
 
     private final AtomicInteger intRef = new AtomicInteger();
     private final AtomicBoolean boolRef = new AtomicBoolean();