private fields are unchanged after construction, so might as well be final

git-svn-id: https://svn.apache.org/repos/asf/commons/sandbox/csv/trunk@1298221 13f79535-47bb-0310-9956-ffa450edef68

Author: sebbASF

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

@@ -64,7 +64,7 @@ public class CSVParser implements Iterable<String[]> {
     /** Immutable empty String array. */
     private static final String[] EMPTY_STRING_ARRAY = new String[0];
 
-    private CSVLexer lexer;
+    private final CSVLexer lexer;
 
     // the following objects are shared to reduce garbage
 
@@ -235,10 +235,10 @@ class CSVLexer {
 
     private final CharBuffer wsBuf = new CharBuffer();
 
-    private CSVFormat format;
+    private final CSVFormat format;
 
     /** The input stream */
-    private ExtendedBufferedReader in;
+    private final ExtendedBufferedReader in;
 
     /**
      * Token is an internal token representation.