NullPointerException when running version check

[dinoboy197]

The plugin seems to break with an NPE when attempting to log resolutions for a conflict:

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.ning.maven.plugins:maven-dependency-versions-check-plugin:2.0.2:check (default) on project dora: While running mojo: 
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.MojoExecutionException: While running mojo: 
    at com.ning.maven.plugins.dependencyversionscheck.AbstractDependencyVersionsMojo.execute(AbstractDependencyVersionsMojo.java:283)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
    ... 20 more
Caused by: java.lang.NullPointerException
    at com.ning.maven.plugins.dependencyversionscheck.DependencyVersionsCheckMojo.logResolutionsForConflict(DependencyVersionsCheckMojo.java:151)
    at com.ning.maven.plugins.dependencyversionscheck.DependencyVersionsCheckMojo.reportConflicts(DependencyVersionsCheckMojo.java:121)
    at com.ning.maven.plugins.dependencyversionscheck.DependencyVersionsCheckMojo.doExecute(DependencyVersionsCheckMojo.java:60)
    at com.ning.maven.plugins.dependencyversionscheck.AbstractDependencyVersionsMojo.execute(AbstractDependencyVersionsMojo.java:273)
    ... 22 more