Cannot construct org.apache.maven.plugin.war.util.WebappStructure as it does not have a no-args constructor

Perhaps a version of maven war plugin is being used, which does not work with Java 7? As per this issue (which describes a similar problem), 2.1.1 version of maven war plugin should work.

Include the following in your pom.xml

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-war-plugin</artifactId>
    <version>2.1.1</version>
</plugin>