Add blank line between java and javax imports

See gh-23539

spring-oxm/src/main/java/org/springframework/oxm/Marshaller.java

@@ -17,6 +17,7 @@
 package org.springframework.oxm;
 
 import java.io.IOException;
+
 import javax.xml.transform.Result;
 
 /**

spring-oxm/src/main/java/org/springframework/oxm/Unmarshaller.java

@@ -17,6 +17,7 @@
 package org.springframework.oxm;
 
 import java.io.IOException;
+
 import javax.xml.transform.Source;
 
 /**

spring-oxm/src/main/java/org/springframework/oxm/jaxb/ClassPathJaxb2TypeScanner.java

@@ -19,6 +19,7 @@ package org.springframework.oxm.jaxb;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+
 import javax.xml.bind.annotation.XmlEnum;
 import javax.xml.bind.annotation.XmlRegistry;
 import javax.xml.bind.annotation.XmlRootElement;

spring-oxm/src/main/java/org/springframework/oxm/jaxb/Jaxb2Marshaller.java

@@ -37,6 +37,7 @@ import java.util.Calendar;
 import java.util.Date;
 import java.util.Map;
 import java.util.UUID;
+
 import javax.activation.DataHandler;
 import javax.activation.DataSource;
 import javax.xml.XMLConstants;

spring-oxm/src/main/java/org/springframework/oxm/jibx/JibxMarshaller.java

@@ -23,6 +23,7 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.Reader;
 import java.io.Writer;
+
 import javax.xml.stream.XMLEventReader;
 import javax.xml.stream.XMLEventWriter;
 import javax.xml.stream.XMLStreamException;

spring-oxm/src/main/java/org/springframework/oxm/mime/MimeMarshaller.java

@@ -17,6 +17,7 @@
 package org.springframework.oxm.mime;
 
 import java.io.IOException;
+
 import javax.xml.transform.Result;
 
 import org.springframework.lang.Nullable;

spring-oxm/src/main/java/org/springframework/oxm/mime/MimeUnmarshaller.java

@@ -17,6 +17,7 @@
 package org.springframework.oxm.mime;
 
 import java.io.IOException;
+
 import javax.xml.transform.Source;
 
 import org.springframework.lang.Nullable;

spring-oxm/src/main/java/org/springframework/oxm/support/AbstractMarshaller.java

@@ -22,6 +22,7 @@ import java.io.OutputStream;
 import java.io.Reader;
 import java.io.StringReader;
 import java.io.Writer;
+
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;

spring-oxm/src/main/java/org/springframework/oxm/support/MarshallingSource.java

@@ -17,6 +17,7 @@
 package org.springframework.oxm.support;
 
 import java.io.IOException;
+
 import javax.xml.transform.Source;
 import javax.xml.transform.sax.SAXResult;
 import javax.xml.transform.sax.SAXSource;

spring-oxm/src/main/java/org/springframework/oxm/xstream/XStreamMarshaller.java

@@ -27,6 +27,7 @@ import java.lang.reflect.Constructor;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+
 import javax.xml.stream.XMLEventReader;
 import javax.xml.stream.XMLEventWriter;
 import javax.xml.stream.XMLStreamException;