Problem after converting JPA-project into maven project

Hi

I have created one JPA project and conveted it into Maven project after doing this one error is coming

on first line of pom.xml,

<project  xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd">

description of error is below

"Multiple annotations found at this line:

- Error resolving version for plugin 'org.apache.maven.plugins:' from the repositories [local (C:\Users\sunil.kumar.maurya

  \.m2\nwcloud.samples.repository), central (http://repo.maven.apache.org/maven2)]: Plugin not found in any plugin repository

- Failure to transfer org.apache.maven.plugins:maven-resources-plugin:pom:2.5 from http://repo.maven.apache.org/maven2 was cached in

  the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not

  transfer artifact org.apache.maven.plugins:maven-resources-plugin:pom:2.5 from/to central (http://repo.maven.apache.org/maven2): connection

  timed out to http://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-resources-plugin/2.5/maven-resources-plugin-2.5.pom

"

I checked my proxies and updated maven project but error is still persist.

Please help me to vanish this error.

Thanks:

Sunil