Ignore two findbugs violations

.travis.yml

@@ -14,8 +14,8 @@ matrix:
         - ln -s /etc/ssl/certs/java/cacerts "${JAVA_HOME}/lib/security/cacerts"
     - jdk: openjdk10
       before_install:
-        - rm "${JAVA_HOME}/lib/security/cacerts"
-        - ln -s /etc/ssl/certs/java/cacerts "${JAVA_HOME}/lib/security/cacerts"
+        - sudo rm "${JAVA_HOME}/lib/security/cacerts"
+        - sudo ln -s /etc/ssl/certs/java/cacerts "${JAVA_HOME}/lib/security/cacerts"
     - jdk: openjdk11
 
 env:

pom.xml

@@ -226,6 +226,18 @@
       <version>1.7.19</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>com.google.code.findbugs</groupId>
+      <artifactId>annotations</artifactId>
+      <version>3.0.1</version>
+      <scope>provided</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.code.findbugs</groupId>
+      <artifactId>jsr305</artifactId>
+      <version>3.0.1</version>
+      <scope>provided</scope>
+    </dependency>
   </dependencies>
 
   <build>

src/main/java/com/spotify/docker/BuildMojo.java

@@ -39,6 +39,7 @@
 import com.typesafe.config.ConfigFactory;
 import com.typesafe.config.ConfigValue;
 
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import org.apache.maven.artifact.Artifact;
 import org.apache.maven.model.Resource;
 import org.apache.maven.plugin.MojoExecutionException;
@@ -778,6 +779,7 @@ private String normalizeDest(final String filePath) {
     return dest;
   }
 
+  @SuppressFBWarnings("NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE")
   private List<String> copyResources(String destination) throws IOException {
 
     final List<String> allCopiedPaths = newArrayList();

src/main/java/com/spotify/docker/Utils.java

@@ -26,6 +26,7 @@
 import com.spotify.docker.client.exceptions.DockerException;
 import com.spotify.docker.client.ProgressHandler;
 import com.spotify.docker.client.messages.ProgressMessage;
+import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugin.logging.Log;
 
@@ -162,6 +163,7 @@ public static void saveImage(DockerClient docker, String imageName,
       java.nio.file.Files.copy(is, tarArchivePath, StandardCopyOption.REPLACE_EXISTING);
   }
 
+  @SuppressFBWarnings("NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE")
   public static void writeImageInfoFile(final DockerBuildInformation buildInfo,
                                         final String tagInfoFile) throws IOException {
     final Path imageInfoPath = Paths.get(tagInfoFile);