<plugin>
    <groupId>org.apache.cxf</groupId>
    <artifactId>cxf-codegen-plugin</artifactId>
    <version>${cxf.version}</version>
    <executions>
        <execution>
            <id>generate-sources</id>
            <phase>generate-sources</phase>
            <!--<phase>none</phase>-->

mvn org.apache.cxf:cxf-codegen-plugin:wsdl2java

<plugin>
    <groupId>org.apache.cxf</groupId>
    <artifactId>cxf-codegen-plugin</artifactId>
    <version>${cxf.version}</version>
    <configuration><!-- HERE YOUR CONFIG --></configuration>
</plugin>

mvn generate-sources

<profiles>
   <profile>
      <id>generate-cxf</id>
      <build>
         <defaultGoal>generate-sources</defaultGoal>
         <plugins>
           <plugin>
                <groupId>org.apache.cxf</groupId>
                <artifactId>cxf-codegen-plugin</artifactId>
                <version>${cxf.version}</version>
                <executions><!-- HERE YOUR EXECUTIONS--></executions>
            </plugin>
         </plugins>
      </build>
     </profile>
</profiles>

mvn generate-sources -Pgenerate-cxf

mvn -Pgenerate-cxf

mvn org.apache.cxf:cxf-codegen-plugin:VERSION_HERE:wsdl2java:@EXEC_ID_HERE