Attempt to allow Eclipse to import the Gradle project.

api/build.gradle

@@ -1,12 +1,12 @@
 plugins {
     id 'java'
-    id 'com.github.johnrengelman.shadow' version '2.0.4'
     id 'maven-publish'
     id 'checkstyle'
 }
 
 apply from: '../gradle/checkerframework.gradle'
 apply from: '../gradle/checkstyle.gradle'
+apply plugin: 'com.github.johnrengelman.shadow'
 
 sourceSets {
     ap {

build.gradle

@@ -1,3 +1,12 @@
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.4'
+    }
+}
+
 plugins {
     id 'java'
 }

proxy/build.gradle

@@ -1,12 +1,12 @@
 plugins {
     id 'java'
-    id 'com.github.johnrengelman.shadow' version '2.0.4'
     id 'de.sebastianboegl.shadow.transformer.log4j' version '2.1.1'
     id 'checkstyle'
 }
 
 apply from: '../gradle/checkerframework.gradle'
 apply from: '../gradle/checkstyle.gradle'
+apply plugin: 'com.github.johnrengelman.shadow'
 
 jar {
     manifest {