org.apache.maven.plugin.PluginResolutionException: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of its dependencies could not be resolved: Faile
Some files where missing at your local repository. Usually under ${user.home}/.m2/repository/
Neets answer solves the problem. However if you dont want do download all the dependencies to your local repository again you could add the missing dependency to a project of yours and compile it.
Use the maven repository website to find the dependency. In your case http://mvnrepository.com/artifact/org.apache.maven.plugins/maven-resources-plugin/2.5 was missing.
Copy the listed XML to the pom.xml file of your project. In this case
org.apache.maven.plugins
maven-resources-plugin
2.5
Run mvn compile in the root folder of the pom.xml. Maven will download all missing dependencies. After the download you can remove the added dependency.
Now you should be able to import the maven project or update the project without the error.