Fix Javadoc errors

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/PagingQueryProvider.java

@@ -91,7 +91,7 @@ public interface PagingQueryProvider {
 	 * Returns either a String to be used as the named placeholder for a sort key value (based on the column name)
 	 * or a ? for unnamed parameters.
 	 * 
-	 * @param The sort key name
+	 * @param keyName The sort key name
 	 * @return The string to be used for a parameterized query.
 	 */
 	String getSortKeyPlaceHolder(String keyName);

spring-batch-infrastructure/src/main/java/org/springframework/batch/item/database/support/SqlPagingQueryProviderFactoryBean.java

@@ -124,7 +124,7 @@ public class SqlPagingQueryProviderFactoryBean implements FactoryBean {
 	}
 
 	/**
-	 * @param sortKeys the sortKey to set
+	 * @param sortKeys the sortKeys to set
 	 */
 	public void setSortKeys(Map<String, Order> sortKeys) {
 		this.sortKeys = sortKeys;