Added spotbugs and errorprone plugins.

build.gradle

@@ -4,8 +4,12 @@ plugins {
     id "com.jfrog.bintray" version "1.8.3"
     id "com.github.ben-manes.versions" version "0.20.0"
     id "net.thauvin.erik.gradle.semver" version "0.9.5-beta"
+    id "com.github.spotbugs" version "1.6.2"
+    id "net.ltgt.errorprone" version "0.0.14"
 }
 
+
+import com.github.spotbugs.SpotBugsTask
 import org.apache.tools.ant.taskdefs.condition.Os
 
 defaultTasks 'check'
@@ -35,6 +39,7 @@ repositories {
 
 dependencies {
     compile 'com.github.spullara.mustache.java:compiler:0.9.5'
+    spotbugsPlugins 'com.h3xstream.findsecbugs:findsecbugs-plugin:1.7.1'
     testCompile 'org.testng:testng:6.14.3'
 }
 
@@ -137,6 +142,13 @@ test {
     useTestNG()
 }
 
+tasks.withType(SpotBugsTask) {
+    reports {
+        xml.enabled = false
+        html.enabled = true
+    }
+    excludeFilter = file("$projectDir/config/spotbugs/excludeFilter.xml")
+}
 compileJava {
     options.compilerArgs.add('-proc:none')
 }