Polishing.

Add author tags.

See #1721
Original pull request #1722

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/convert/JdbcConverter.java

@@ -34,6 +34,7 @@ import org.springframework.lang.Nullable;
  * versa.
  *
  * @author Jens Schauder
+ * @author Mark Paluch
  * @since 1.1
  */
 public interface JdbcConverter extends RelationalConverter {

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/repository/query/JdbcQueryMethod.java

@@ -52,6 +52,7 @@ import org.springframework.util.StringUtils;
  * @author Moises Cisneros
  * @author Hebert Coelho
  * @author Diego Krupitza
+ * @author Mark Paluch
  */
 public class JdbcQueryMethod extends QueryMethod {
 

spring-data-relational/src/main/java/org/springframework/data/relational/core/mapping/DerivedSqlIdentifier.java

@@ -63,6 +63,7 @@ class DerivedSqlIdentifier implements SqlIdentifier {
 	@Override
 	public String toSql(IdentifierProcessing processing) {
 
+		// using a local copy of volatile this.sqlName to ensure thread safety.
 		CachedSqlName sqlName = this.sqlName;
 		if (sqlName == null || sqlName.processing != processing) {
 

spring-data-relational/src/main/java/org/springframework/data/relational/core/sql/DefaultSqlIdentifier.java

@@ -62,6 +62,7 @@ class DefaultSqlIdentifier implements SqlIdentifier {
 	@Override
 	public String toSql(IdentifierProcessing processing) {
 
+		// using a local copy of volatile this.sqlName to ensure thread safety.
 		CachedSqlName sqlName = this.sqlName;
 		if (sqlName == null || sqlName.processing != processing) {