import java.io.*;

File child1Codec = new File( basedir, "target/project-1-bin/child-1/commons-codec-1.3.jar" );
File child2Codec = new File( basedir, "target/project-1-bin/child-2/commons-codec-1.3.jar" );

if ( !child1Codec.exists() )
{
    System.out.println( "commons-codec dependency in child-1 module is either missing or is the wrong version. File missing: " + child1Codec );
}

if ( !child2Codec.exists() )
{
    System.out.println( "commons-codec dependency in child-2 module is either missing or is the wrong version. File missing: " + child2Codec );
}

return child1Codec.exists() && child2Codec.exists();