diff --git a/build.gradle b/build.gradle
index 0e716461..ff2db607 100644
--- a/build.gradle
+++ b/build.gradle
@@ -47,7 +47,8 @@ editorconfig {
     '**/*.bzip2',
     '**/*.gzip',
     '**/*.xz',
-    'gradlew*'
+    'gradlew*',
+    '**/bin'
   ]
 }
 
@@ -242,7 +243,7 @@ gradle.projectsEvaluated {
       }
     }
 
-    //'upload' vs. 'publish, see 
+    //'upload' vs. 'publish, see
     //https://medium.com/dot-debug/deploying-artifacts-to-maven-using-gradle-b669acc1b6f8'
     /*
     task publish {
@@ -264,7 +265,7 @@ gradle.projectsEvaluated {
       repositories {
         maven {
           name = 'localEmbedded'
-          // run generated gradle task `./gradlew 
+          // run generated gradle task `./gradlew
           // publishMavenArtifactsPublicationToLocalEmbeddedRepository`
           // to publish all subprojects into the same local embedded repo:
           url = "file://${rootDir}/build/repo"
diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index b3104532..06f410f1 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -6,7 +6,7 @@
     <module name="SuppressWarningsFilter" />
     <module name="SuppressionSingleFilter">
         <property name="checks" value=".*"/>
-        <property name="files" value="generated-src"/>
+        <property name="files" value="generated-src|harvester2"/>
     </module>
     <module name="TreeWalker">
         <module name="AbstractClassName"/>
diff --git a/metafacture-biblio/src/main/java/org/metafacture/biblio/OaiPmhOpener.java b/metafacture-biblio/src/main/java/org/metafacture/biblio/OaiPmhOpener.java
index 908e6d05..d9fa8c42 100644
--- a/metafacture-biblio/src/main/java/org/metafacture/biblio/OaiPmhOpener.java
+++ b/metafacture-biblio/src/main/java/org/metafacture/biblio/OaiPmhOpener.java
@@ -3,24 +3,24 @@
 
 package org.metafacture.biblio;
 
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.io.Reader;
-
-import javax.xml.parsers.ParserConfigurationException;
-import javax.xml.xpath.XPathException;
-
 import org.metafacture.framework.MetafactureException;
 import org.metafacture.framework.ObjectReceiver;
 import org.metafacture.framework.annotations.Description;
 import org.metafacture.framework.annotations.In;
 import org.metafacture.framework.annotations.Out;
 import org.metafacture.framework.helpers.DefaultObjectPipe;
+
 import org.oclc.oai.harvester2.app.RawWrite;
 import org.xml.sax.SAXException;
 
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import javax.xml.parsers.ParserConfigurationException;
+import javax.xml.xpath.XPathException;
+
 /**
  * Opens an OAI-PMH stream and passes a reader to the receiver.
  *
@@ -114,7 +114,7 @@ public void process(final String baseUrl) {
         catch (final NoSuchFieldException e) {
             e.printStackTrace();
         }
-        catch (XPathException e) {
+        catch (final XPathException e) {
             e.printStackTrace();
         }
         try {
diff --git a/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/app/RawWrite.java b/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/app/RawWrite.java
index 8e4dbe82..6cbce310 100644
--- a/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/app/RawWrite.java
+++ b/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/app/RawWrite.java
@@ -31,8 +31,8 @@ public static void main(String[] args) {
         try {
             System.out.println(new Date());
 
-            HashMap options = getOptions(args);
-            List rootArgs = (List) options.get("rootArgs");
+            HashMap<String, Object> options = getOptions(args);
+            List<?> rootArgs = (List<?>) options.get("rootArgs");
             String baseURL = null;
             if (rootArgs.size() > 0) {
                 baseURL = (String) rootArgs.get(0);
@@ -151,9 +151,9 @@ public static void run(String baseURL, String from, String until,
         out.write("</harvest>\n".getBytes("UTF-8"));
     }
 
-    private static HashMap getOptions(String[] args) {
-        HashMap options = new HashMap();
-        ArrayList rootArgs = new ArrayList();
+    private static HashMap<String, Object> getOptions(String[] args) {
+        HashMap<String, Object> options = new HashMap<>();
+        ArrayList<String> rootArgs = new ArrayList<>();
         options.put("rootArgs", rootArgs);
 
         for (int i = 0; i < args.length; ++i) {
diff --git a/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/ListIdentifiers.java b/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/ListIdentifiers.java
index bfeed92a..6a0c340c 100644
--- a/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/ListIdentifiers.java
+++ b/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/ListIdentifiers.java
@@ -12,8 +12,11 @@
 package org.oclc.oai.harvester2.verb;
 
 import java.io.IOException;
+import java.io.UnsupportedEncodingException;
 import java.net.MalformedURLException;
 import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
+
 import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.xpath.XPathExpressionException;
 import org.xml.sax.SAXException;
@@ -106,12 +109,13 @@ private static String getRequestURL(String baseURL, String from, String until, S
      * @param baseURL
      * @param resumptionToken
      * @return
+     * @throws UnsupportedEncodingException
      */
     private static String getRequestURL(String baseURL,
-            String resumptionToken) {
+            String resumptionToken) throws UnsupportedEncodingException {
         StringBuilder requestURL = new StringBuilder(baseURL);
         requestURL.append("?verb=ListIdentifiers");
-        requestURL.append("&resumptionToken=").append(URLEncoder.encode(resumptionToken));
+        requestURL.append("&resumptionToken=").append(URLEncoder.encode(resumptionToken, StandardCharsets.UTF_8.name()));
         return requestURL.toString();
     }
 }
diff --git a/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/ListMetadataFormats.java b/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/ListMetadataFormats.java
index dc50dded..0facd07e 100644
--- a/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/ListMetadataFormats.java
+++ b/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/ListMetadataFormats.java
@@ -41,7 +41,7 @@ public ListMetadataFormats() {
      * @throws javax.xml.xpath.XPathExpressionException
      * @throws IOException an I/O error occurred
      */
-    public ListMetadataFormats(String baseURL) throws IOException, ParserConfigurationException, 
+    public ListMetadataFormats(String baseURL) throws IOException, ParserConfigurationException,
             SAXException, XPathExpressionException {
         this(baseURL, null);
     }
diff --git a/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/OAINamespaceContext.java b/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/OAINamespaceContext.java
index 8eb8a743..ec4033f9 100644
--- a/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/OAINamespaceContext.java
+++ b/metafacture-biblio/src/main/java/org/oclc/oai/harvester2/verb/OAINamespaceContext.java
@@ -36,7 +36,7 @@ public String getPrefix(String namespaceURI) {
     }
 
     @Override
-    public Iterator getPrefixes(String namespaceURI) {
+    public Iterator<?> getPrefixes(String namespaceURI) {
         return null;
     }