code: private void initExecutables() {
          if (StringUtils.isBlank(cmdMvn.getExecutable())) {
              if (StringUtils.isBlank(mvnExecutable)) {
                  mvnExecutable = "mvn";
              }
              cmdMvn.setExecutable(mvnExecutable);
          }
          if (StringUtils.isBlank(cmdGit.getExecutable())) {
              if (StringUtils.isBlank(gitExecutable)) {
                  gitExecutable = "git";
              }
              cmdGit.setExecutable(gitExecutable);
          }
      }
docs: Initializes command line executables.