diff --git a/src/main/java/org/springframework/data/jdbc/core/function/DatabaseClient.java b/src/main/java/org/springframework/data/jdbc/core/function/DatabaseClient.java
index a17ad27..cf8172b 100644
--- a/src/main/java/org/springframework/data/jdbc/core/function/DatabaseClient.java
+++ b/src/main/java/org/springframework/data/jdbc/core/function/DatabaseClient.java
@@ -71,7 +71,7 @@ public interface DatabaseClient {
 	}
 
 	/**
-	 * Obtain a {@code WebClient} builder.
+	 * Obtain a {@code DatabaseClient} builder.
 	 */
 	static DatabaseClient.Builder builder() {
 		return new DefaultDatabaseClientBuilder();
@@ -219,6 +219,12 @@ public interface DatabaseClient {
 		 */
 		GenericInsertSpec into(String table);
 
+		/**
+		 * Specify the target {@link Class} table to insert to using the {@link Class entity class}.
+		 *
+		 * @param table must not be {@literal null}.
+		 * @return
+		 */
 		<T> TypedInsertSpec<T> into(Class<T> table);
 	}
 
diff --git a/src/main/java/org/springframework/data/jdbc/core/function/DefaultDatabaseClient.java b/src/main/java/org/springframework/data/jdbc/core/function/DefaultDatabaseClient.java
index e254735..320684b 100644
--- a/src/main/java/org/springframework/data/jdbc/core/function/DefaultDatabaseClient.java
+++ b/src/main/java/org/springframework/data/jdbc/core/function/DefaultDatabaseClient.java
@@ -62,7 +62,7 @@ import org.springframework.util.Assert;
 class DefaultDatabaseClient implements DatabaseClient, ConnectionAccessor {
 
 	/** Logger available to subclasses */
-	protected final Log logger = LogFactory.getLog(getClass());
+	private final Log logger = LogFactory.getLog(getClass());
 
 	private final ConnectionFactory connector;
 
@@ -72,7 +72,7 @@ class DefaultDatabaseClient implements DatabaseClient, ConnectionAccessor {
 
 	private final DefaultDatabaseClientBuilder builder;
 
-	public DefaultDatabaseClient(ConnectionFactory connector, SQLExceptionTranslator exceptionTranslator,
+	DefaultDatabaseClient(ConnectionFactory connector, SQLExceptionTranslator exceptionTranslator,
 			ReactiveDataAccessStrategy dataAccessStrategy, DefaultDatabaseClientBuilder builder) {
 
 		this.connector = connector;