Improve Javadoc for DatabasePopulator

See gh-27008

Author: sbrannen

spring-jdbc/src/main/java/org/springframework/jdbc/datasource/init/DatabasePopulator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,15 +35,17 @@ public interface DatabasePopulator {
 	/**
 	 * Populate, initialize, or clean up the database using the provided JDBC
 	 * connection.
+	 * <p><strong>Warning</strong>: Concrete implementations should not close
+	 * the provided {@link Connection}.
 	 * <p>Concrete implementations <em>may</em> throw an {@link SQLException} if
 	 * an error is encountered but are <em>strongly encouraged</em> to throw a
 	 * specific {@link ScriptException} instead. For example, Spring's
 	 * {@link ResourceDatabasePopulator} and {@link DatabasePopulatorUtils} wrap
 	 * all {@code SQLExceptions} in {@code ScriptExceptions}.
-	 * @param connection the JDBC connection to use to populate the db; already
-	 * configured and ready to use; never {@code null}
+	 * @param connection the JDBC connection to use; already configured and
+	 * ready to use; never {@code null}
 	 * @throws SQLException if an unrecoverable data access exception occurs
-	 * during database population
+	 * while interacting with the database
 	 * @throws ScriptException in all other error cases
 	 * @see DatabasePopulatorUtils#execute
 	 */