javaee-endorsed-api-7.0 not found

I had the same problem. Just go to Tools--> Plugin-->Available Plugins---> Search for EJB and Ear and install it. The problem will be gone.

there is a lack of information in your post please add more details, else if you're working in a maven project add this block to your pom.xml:

<dependency>
    <groupId>javax</groupId>
    <artifactId>javaee-endorsed-api</artifactId>
    <version>7.0</version>
</dependency>

else download the jar file and add it to your classpath: http://www.java2s.com/Code/Jar/j/Downloadjavaeeendorsedapi70jar.htm