JAXB XJC Possible to suppress comment creation in generated classes?

If you use ant, the following snippet may be useful for replacing the comments:

<replaceregexp
        match="^// Generated on:.*$" 
        replace="// Generated on: [date removed]"
        byline="true">
    <fileset dir="src">
        <include name="**/*.java"/>
    </fileset>
</replaceregexp>

I am using this Maven plugin which replaces the // Generated on: 2011.02.23 at 02:17:06 PM GMT line:

<plugin>
    <groupId>com.google.code.maven-replacer-plugin</groupId>
    <artifactId>maven-replacer-plugin</artifactId>
    <version>1.3.8</version>
    <executions>
        <execution> 
            <phase>prepare-package</phase>                          
            <goals>
                <goal>replace</goal>
            </goals>
        </execution>
    </executions>
    <configuration>                         
        <includes>                              
            <include>src/main/java/jaxb/*.java</include>            
        </includes>
        <token>^// Generated on.*$</token>
        <value>// Generated on: [TEXT REMOVED by maven-replacer-plugin]</value>                         
        <regexFlags>
            <regexFlag>MULTILINE</regexFlag>
        </regexFlags>
    </configuration>
</plugin>

I'm late to the party, but since version 2.0 of the jaxb2-maven-plugin, there's a noGeneratedHeaderComments configuration option. (see the JAXB-2 Maven Plugin Docs)

You can use it like this:

...
<plugins>
    <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>jaxb2-maven-plugin</artifactId>
        <version>2.3.1</version>
        <executions>
            <execution>
                <id>xjc</id>
                <goals>
                    <goal>xjc</goal>
                </goals>
            </execution>
        </executions>
        <configuration>
            <target>2.1</target>
            <sources>
                <source>FirstXSD.xsd</source>
                <source>SecondXSD.xsd</source>
            </sources>
            <xjbSources>
                <xjbSource>OptionalBindings.xjb</xjbSource>
            </xjbSources>
            <noGeneratedHeaderComments>true</noGeneratedHeaderComments>
        </configuration>
        <dependencies>
            <dependency>
                <groupId>org.glassfish.jaxb</groupId>
                <artifactId>jaxb-xjc</artifactId>
                <version>${jaxb.version}</version>
            </dependency>
        </dependencies>
    </plugin>
</plugins>
...

So no need for another plugin or script to run.

If you want to keep a disclaimer, you can use one of the techniques already mentioned to inject it where wanted.