Better resource management.

Author: garydgregory

src/test/java/org/apache/commons/csv/issues/JiraCsv247Test.java

@@ -67,14 +67,16 @@ public void testHeadersMissingThrowsWhenNotAllowingMissingColumnNames() {
         assertFalse(format.getAllowMissingColumnNames(), "By default we should not allow missing column names");
 
         assertThrows(IllegalArgumentException.class, () -> {
-            try (final Reader in = new StringReader("a,,c,d,e\n1,2,3,4,5\nv,w,x,y,z")) {
-                format.parse(in);
+            try (final Reader reader = new StringReader("a,,c,d,e\n1,2,3,4,5\nv,w,x,y,z");
+                CSVParser parser = format.parse(reader);) {
+                // should fail
             }
         }, "1 missing column header is not allowed");
 
         assertThrows(IllegalArgumentException.class, () -> {
-            try (final Reader in = new StringReader("a,,c,d,\n1,2,3,4,5\nv,w,x,y,z")) {
-                format.parse(in);
+            try (final Reader reader = new StringReader("a,,c,d,\n1,2,3,4,5\nv,w,x,y,z");
+                CSVParser parser = format.parse(reader);) {
+                // should fail
             }
         }, "2+ missing column headers is not allowed!");
     }