Add Checstyle MultipleVariableDeclarations

Author: garydgregory

src/conf/checkstyle/checkstyle.xml

@@ -65,6 +65,7 @@ limitations under the License.
     <module name="LocalFinalVariableName" />
     <module name="MissingOverride" />
     <module name="ModifierOrder" />
+    <module name="MultipleVariableDeclarations" />
     <module name="NeedBraces" />
     <module name="OperatorWrap">
       <property name="option" value="eol" />

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

@@ -68,7 +68,8 @@ public String toString() {
     }
 
     private Map<String, Integer> headerMap;
-    private CSVRecord record, recordWithHeader;
+    private CSVRecord record;
+    private CSVRecord recordWithHeader;
     private String[] values;
 
     @BeforeEach

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

@@ -95,7 +95,8 @@ public void testReadChar() throws Exception {
 
     @Test
     public void testReadingInDifferentBuffer() throws Exception {
-        final char[] tmp1 = new char[2], tmp2 = new char[4];
+        final char[] tmp1 = new char[2];
+        final char[] tmp2 = new char[4];
         try (ExtendedBufferedReader reader = createBufferedReader("1\r\n2\r\n")) {
             reader.read(tmp1, 0, 2);
             reader.read(tmp2, 2, 2);