Add @SuppressWarnings and comments

Format

Author: garydgregory

src/main/java/org/apache/commons/csv/CSVParser.java

@@ -552,9 +552,9 @@ public CSVParser(final Reader reader, final CSVFormat format, final long charact
      *             If there is a problem reading the header or skipping the first record.
      * @throws CSVException Thrown on invalid CSV input data.
      */
-    private CSVParser(final Reader reader, final CSVFormat format, final long characterOffset, final long recordNumber,
-        final Charset charset, final boolean trackBytes)
-        throws IOException {
+    @SuppressWarnings("resource") // reader is managed by lexer.
+    private CSVParser(final Reader reader, final CSVFormat format, final long characterOffset, final long recordNumber, final Charset charset,
+            final boolean trackBytes) throws IOException {
         Objects.requireNonNull(reader, "reader");
         Objects.requireNonNull(format, "format");
         this.format = format.copy();

src/test/java/org/apache/commons/csv/JiraCsv196Test.java

@@ -38,11 +38,13 @@ private Reader getTestInput(final String path) {
     public void testParseFourBytes() throws IOException {
         final CSVFormat format = CSVFormat.Builder.create().setDelimiter(',').setQuote('\'').get();
         // @formatter:off
-        try (CSVParser parser = new CSVParser.Builder()
+        try (@SuppressWarnings("resource") // parser closes the reader.
+            CSVParser parser = new CSVParser.Builder()
                 .setFormat(format)
                 .setReader(getTestInput("org/apache/commons/csv/CSV-196/emoji.csv"))
                 .setCharset(StandardCharsets.UTF_8)
-                .setTrackBytes(true).get()) {
+                .setTrackBytes(true)
+                .get()) {
             // @formatter:on
             final long[] charByteKey = { 0, 84, 701, 1318, 1935 };
             int idx = 0;
@@ -56,11 +58,13 @@ public void testParseFourBytes() throws IOException {
     public void testParseThreeBytes() throws IOException {
         final CSVFormat format = CSVFormat.Builder.create().setDelimiter(',').setQuote('\'').get();
         // @formatter:off
-        try (CSVParser parser = new CSVParser.Builder()
+        try (@SuppressWarnings("resource") // parser closes the reader.
+            CSVParser parser = new CSVParser.Builder()
                 .setFormat(format)
                 .setReader(getTestInput("org/apache/commons/csv/CSV-196/japanese.csv"))
                 .setCharset(StandardCharsets.UTF_8)
-                .setTrackBytes(true).get()) {
+                .setTrackBytes(true)
+                .get()) {
             // @formatter:on
             final long[] charByteKey = { 0, 89, 242, 395 };
             int idx = 0;