diff --git a/.circleci/key.p12.enc b/.circleci/key.p12.enc
index be3d8cf..ed07f35 100644
Binary files a/.circleci/key.p12.enc and b/.circleci/key.p12.enc differ
diff --git a/.gitignore b/.gitignore
index f88df09..255e0fb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@
 /captures
 TODO
 key.p12
+/keystore
diff --git a/app/build.gradle b/app/build.gradle
index 05c5390..11a38af 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -32,8 +32,8 @@ android {
     applicationId "com.stealthcotper.networktools"
     minSdkVersion minSdkVer
     targetSdkVersion targetSdkVer
-    versionCode versionName
-    versionName versionCode
+    versionName appVersionName
+    versionCode appVersionCode
     archivesBaseName = "AndroidNetworkTools"
     testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
   }
diff --git a/build.gradle b/build.gradle
index 92d1190..90c9eb9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,6 +30,6 @@ subprojects {
   ext.targetSdkVer = 27
   ext.supportLibVer = "27.1.1"
 
-  ext.versionName = "0.4.0"
-  ext.versionCode = 14
+  ext.appVersionName = "0.4.0"
+  ext.appVersionCode = 14
 }
diff --git a/library/build.gradle b/library/build.gradle
index 6715221..e3cfdfd 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -8,5 +8,20 @@ dependencies {
   testImplementation 'org.mockito:mockito-core:2.10.0'
 }
 
+task sourcesJar(type: Jar, dependsOn: classes) {
+    classifier = 'sources'
+    from sourceSets.main.allSource
+}
+
+task javadocJar(type: Jar) {
+    classifier = 'javadoc'
+    from javadoc
+}
+
+artifacts {
+    archives sourcesJar
+    archives javadocJar
+}
+
 sourceCompatibility = "1.7"
 targetCompatibility = "1.7"
\ No newline at end of file
diff --git a/library/src/main/java/com/stealthcopter/networktools/ARPInfo.java b/library/src/main/java/com/stealthcopter/networktools/ARPInfo.java
index 46d4878..2c07a99 100644
--- a/library/src/main/java/com/stealthcopter/networktools/ARPInfo.java
+++ b/library/src/main/java/com/stealthcopter/networktools/ARPInfo.java
@@ -8,10 +8,10 @@
 
 /**
  * Created by mat on 09/12/15.
- * <p/>
+ *
  * Looks at the file at /proc/net/arp to fromIPAddress ip/mac addresses from the cache
  * We assume that the file has this structure:
- * <p/>
+ *
  * IP address       HW type     Flags       HW address            Mask     Device
  * 192.168.18.11    0x1         0x2         00:04:20:06:55:1a     *        eth0
  * 192.168.18.36    0x1         0x2         00:22:43:ab:2a:5b     *        eth0
diff --git a/library/src/main/java/com/stealthcopter/networktools/Ping.java b/library/src/main/java/com/stealthcopter/networktools/Ping.java
index 2d711bd..304c54e 100644
--- a/library/src/main/java/com/stealthcopter/networktools/Ping.java
+++ b/library/src/main/java/com/stealthcopter/networktools/Ping.java
@@ -154,6 +154,7 @@ public void cancel() {
      * request
      *
      * @return - ping result
+     * @throws UnknownHostException - if the host cannot be resolved
      */
     public PingResult doPing() throws UnknownHostException {
         cancelled = false;
diff --git a/library/src/main/java/com/stealthcopter/networktools/PortScan.java b/library/src/main/java/com/stealthcopter/networktools/PortScan.java
index e47de2e..ef9f0bc 100644
--- a/library/src/main/java/com/stealthcopter/networktools/PortScan.java
+++ b/library/src/main/java/com/stealthcopter/networktools/PortScan.java
@@ -54,7 +54,7 @@ public interface PortListener {
      * @param address - Address to be pinged
      * @return this object to allow chaining
      * @throws UnknownHostException - if no IP address for the
-     *                              <code>host</code> could be found, or if a scope_id was specified
+     *                              {@code host} could be found, or if a scope_id was specified
      *                              for a global IPv6 address.
      */
     public static PortScan onAddress(String address) throws UnknownHostException {
diff --git a/library/src/main/java/com/stealthcopter/networktools/SubnetDevices.java b/library/src/main/java/com/stealthcopter/networktools/SubnetDevices.java
index 65dc7d3..f42b9ee 100644
--- a/library/src/main/java/com/stealthcopter/networktools/SubnetDevices.java
+++ b/library/src/main/java/com/stealthcopter/networktools/SubnetDevices.java
@@ -34,6 +34,8 @@ public interface OnSubnetDeviceFound {
 
     /**
      * Find devices on the subnet working from the local device ip address
+     *
+     * @return - this for chaining
      */
     public static SubnetDevices fromLocalAddress() {
         InetAddress ipv4 = IPTools.getLocalIPv4Address();
@@ -47,6 +49,8 @@ public static SubnetDevices fromLocalAddress() {
 
     /**
      * @param inetAddress - an ip address in the subnet
+     *
+     * @return - this for chaining
      */
     public static SubnetDevices fromIPAddress(InetAddress inetAddress) {
         return fromIPAddress(inetAddress.getHostAddress());
@@ -55,6 +59,8 @@ public static SubnetDevices fromIPAddress(InetAddress inetAddress) {
     /**
      * @param ipAddress - the ipAddress string of any device in the subnet i.e. "192.168.0.1"
      *                  the final part will be ignored
+     *
+     * @return - this for chaining
      */
     public static SubnetDevices fromIPAddress(final String ipAddress) {
 
@@ -84,6 +90,8 @@ public static SubnetDevices fromIPAddress(final String ipAddress) {
 
     /**
      * @param ipAddresses - the ipAddresses of devices to be checked
+     *
+     * @return - this for chaining
      */
     public static SubnetDevices fromIPList(final List<String> ipAddresses) {
 
@@ -100,8 +108,10 @@ public static SubnetDevices fromIPList(final List<String> ipAddresses) {
     /**
      * @param noThreads set the number of threads to work with, note we default to a large number
      *                  as these requests are network heavy not cpu heavy.
-     * @return self
-     * @throws IllegalAccessException
+     *
+     * @throws IllegalArgumentException - if invalid number of threads requested
+     *
+     * @return - this for chaining
      */
     public SubnetDevices setNoThreads(int noThreads) throws IllegalArgumentException {
         if (noThreads < 1) throw new IllegalArgumentException("Cannot have less than 1 thread");
@@ -112,9 +122,13 @@ public SubnetDevices setNoThreads(int noThreads) throws IllegalArgumentException
     /**
      * Sets the timeout for each address we try to ping
      *
+     * @param timeOutMillis - timeout in milliseconds for each ping
+     *
      * @return this object to allow chaining
+     *
+     * @throws IllegalArgumentException - if timeout is less than zero
      */
-    public SubnetDevices setTimeOutMillis(int timeOutMillis) {
+    public SubnetDevices setTimeOutMillis(int timeOutMillis) throws IllegalArgumentException {
         if (timeOutMillis < 0) throw new IllegalArgumentException("Timeout cannot be less than 0");
         this.timeOutMillis = timeOutMillis;
         return this;
diff --git a/library/src/main/java/com/stealthcopter/networktools/WakeOnLan.java b/library/src/main/java/com/stealthcopter/networktools/WakeOnLan.java
index d7ad69f..53adb5f 100644
--- a/library/src/main/java/com/stealthcopter/networktools/WakeOnLan.java
+++ b/library/src/main/java/com/stealthcopter/networktools/WakeOnLan.java
@@ -141,6 +141,8 @@ public void wake() throws IOException {
     /**
      * Asynchronous call of the wake method. This will be performed on the background thread
      * and optionally fire a listener when complete, or when an error occurs
+     *
+     * @param wakeOnLanListener - listener to call on result
      */
     public void wake(final WakeOnLanListener wakeOnLanListener) {
 
@@ -165,6 +167,9 @@ public void run() {
      *
      * @param ipStr  - IP String to send to
      * @param macStr - MAC address to wake up
+     *
+     * @throws IllegalArgumentException - invalid ip or mac
+     * @throws IOException - error sending packet
      */
     public static void sendWakeOnLan(String ipStr, String macStr) throws IllegalArgumentException, IOException {
         sendWakeOnLan(ipStr, macStr, DEFAULT_PORT, DEFAULT_TIMEOUT_MILLIS, DEFAULT_NO_PACKETS);
@@ -178,6 +183,9 @@ public static void sendWakeOnLan(String ipStr, String macStr) throws IllegalArgu
      * @param port          - port to send packet to
      * @param timeoutMillis - timeout (millis)
      * @param packets       - number of packets to send
+     *
+     * @throws IllegalArgumentException - invalid ip or mac
+     * @throws IOException - error sending packet
      */
     public static void sendWakeOnLan(final String ipStr, final String macStr, final int port, final int timeoutMillis, final int packets) throws IllegalArgumentException, IOException {
         if (ipStr == null) throw new IllegalArgumentException("Address cannot be null");
@@ -193,6 +201,9 @@ public static void sendWakeOnLan(final String ipStr, final String macStr, final
      * @param port          - port to send packet to
      * @param timeoutMillis - timeout (millis)
      * @param packets       - number of packets to send
+     *
+     * @throws IllegalArgumentException - invalid ip or mac
+     * @throws IOException - error sending packet
      */
     public static void sendWakeOnLan(final InetAddress address, final String macStr, final int port, final int timeoutMillis, final int packets) throws IllegalArgumentException, IOException {
         if (address == null) throw new IllegalArgumentException("Address cannot be null");
diff --git a/library/src/main/java/com/stealthcopter/networktools/ping/PingNative.java b/library/src/main/java/com/stealthcopter/networktools/ping/PingNative.java
index ff14754..33daba2 100644
--- a/library/src/main/java/com/stealthcopter/networktools/ping/PingNative.java
+++ b/library/src/main/java/com/stealthcopter/networktools/ping/PingNative.java
@@ -18,6 +18,12 @@ private PingNative() {
 
     public static PingResult ping(InetAddress host, PingOptions pingOptions) throws IOException, InterruptedException {
         PingResult pingResult = new PingResult(host);
+
+        if (host == null) {
+            pingResult.isReachable = false;
+            return pingResult;
+        }
+
         StringBuilder echo = new StringBuilder();
         Runtime runtime = Runtime.getRuntime();
 
@@ -86,13 +92,15 @@ public static PingResult ping(InetAddress host, PingOptions pingOptions) throws
      * # activity_ping 321321.
      * activity_ping: unknown host 321321.
      *
-     * 1. Check if output contains 0% packet loss : Branch to success -> Get stats
-     * 2. Check if output contains 100% packet loss : Branch to fail -> No stats
-     * 3. Check if output contains 25% packet loss : Branch to partial success -> Get stats
+     * 1. Check if output contains 0% packet loss : Branch to success - Get stats
+     * 2. Check if output contains 100% packet loss : Branch to fail - No stats
+     * 3. Check if output contains 25% packet loss : Branch to partial success - Get stats
      * 4. Check if output contains "unknown host"
      *
-     * @param pingResult
-     * @param s
+     * @param pingResult - the current ping result
+     * @param s - result from ping command
+     *
+     * @return The ping result
      */
     public static PingResult getPingStats(PingResult pingResult, String s) {
         String pingError;
diff --git a/library/src/main/java/com/stealthcopter/networktools/ping/PingTools.java b/library/src/main/java/com/stealthcopter/networktools/ping/PingTools.java
index 0bd13c2..ffce1e7 100644
--- a/library/src/main/java/com/stealthcopter/networktools/ping/PingTools.java
+++ b/library/src/main/java/com/stealthcopter/networktools/ping/PingTools.java
@@ -46,8 +46,8 @@ public static PingResult doPing(InetAddress ia, PingOptions pingOptions) {
      * @param ia            - address to ping
      * @param pingOptions   - ping command options
      * @return - the ping results
-     * @throws IOException
-     * @throws InterruptedException
+     * @throws IOException - IO error running ping command
+     * @throws InterruptedException - thread interupt
      */
     public static PingResult doNativePing(InetAddress ia, PingOptions pingOptions) throws IOException, InterruptedException {
         return PingNative.ping(ia, pingOptions);
@@ -64,6 +64,12 @@ public static PingResult doNativePing(InetAddress ia, PingOptions pingOptions) t
      */
     public static PingResult doJavaPing(InetAddress ia, PingOptions pingOptions) {
         PingResult pingResult = new PingResult(ia);
+
+        if (ia == null) {
+            pingResult.isReachable = false;
+            return pingResult;
+        }
+
         try {
             long startTime = System.nanoTime();
             final boolean reached = ia.isReachable(null, pingOptions.getTimeToLive(), pingOptions.getTimeoutMillis());
diff --git a/library/src/main/java/com/stealthcopter/networktools/portscanning/PortScanTCP.java b/library/src/main/java/com/stealthcopter/networktools/portscanning/PortScanTCP.java
index c2537d5..34050b8 100644
--- a/library/src/main/java/com/stealthcopter/networktools/portscanning/PortScanTCP.java
+++ b/library/src/main/java/com/stealthcopter/networktools/portscanning/PortScanTCP.java
@@ -14,6 +14,14 @@ public class PortScanTCP {
     private PortScanTCP() {
     }
 
+    /**
+     * Check if a port is open with TCP
+     *
+     * @param ia            - address to scan
+     * @param portNo        - port to scan
+     * @param timeoutMillis - timeout
+     * @return - true if port is open, false if not or unknown
+     */
     public static boolean scanAddress(InetAddress ia, int portNo, int timeoutMillis) {
 
         Socket s = null;
diff --git a/library/src/main/java/com/stealthcopter/networktools/portscanning/PortScanUDP.java b/library/src/main/java/com/stealthcopter/networktools/portscanning/PortScanUDP.java
index efd1939..fd58e56 100644
--- a/library/src/main/java/com/stealthcopter/networktools/portscanning/PortScanUDP.java
+++ b/library/src/main/java/com/stealthcopter/networktools/portscanning/PortScanUDP.java
@@ -14,6 +14,15 @@ public class PortScanUDP {
     private PortScanUDP() {
     }
 
+    /**
+     * Check if a port is open with UDP, note that this isn't reliable
+     * as UDP will does not send ACKs
+     *
+     * @param ia            - address to scan
+     * @param portNo        - port to scan
+     * @param timeoutMillis - timeout
+     * @return - true if port is open, false if not or unknown
+     */
     public static boolean scanAddress(InetAddress ia, int portNo, int timeoutMillis) {
 
         try {
diff --git a/scripts/github-release.sh b/scripts/github-release.sh
index 90ddc51..e1ec1f5 100755
--- a/scripts/github-release.sh
+++ b/scripts/github-release.sh
@@ -16,7 +16,7 @@ GITHUB_UPLOAD_URL="https://uploads.github.com/repos/stealthcopter/AndroidNetwork
 
 function create_github_release { 
 
-    version=`cat $1/build.gradle | grep -m 1 versionName | cut -d'"' -f 2`
+    version=$2
     
     echo "Uploading release"
     
@@ -33,7 +33,7 @@ function create_github_release {
     echo "Found id $id"
     
     # Upload apk file
-    GITHUB_RELEASE_FILE_PATH="app/build/outputs/apk/release/AndroidNetworkTools.apk"
+    GITHUB_RELEASE_FILE_PATH="app/build/outputs/apk/release/AndroidNetworkTools-release.apk"
     GITHUB_RELASE_FILENAME="AndroidNetworkTools.apk"
     curl -H "Content-Type:application/zip" -H "Authorization: token $GITHUB_RELEASE_TOKEN" --data-binary @"$GITHUB_RELEASE_FILE_PATH" $GITHUB_UPLOAD_URL$id/assets?name=$GITHUB_RELASE_FILENAME
 
@@ -57,7 +57,7 @@ function create_github_release {
 
 if [[ $GIT_TAG != *"undefined"* ]]; then
     echo "Creating github release for tag $GIT_TAG"
-    if create_github_release $GITHUB_RELEASE_MODULE; then
+    if create_github_release $GITHUB_RELEASE_MODULE $GIT_TAG; then
         webhook $GITHUB_RELEASE_MODULE "$GITHUB_RELEASE_NAME" "Created github release for tag $TAG"
     else
         webhook $GITHUB_RELEASE_MODULE "$GITHUB_RELEASE_NAME" "Failed to create github release for tag $TAG :("
diff --git a/scripts/upload-apks.sh b/scripts/upload-apks.sh
index 085e4d6..8a6ebb6 100755
--- a/scripts/upload-apks.sh
+++ b/scripts/upload-apks.sh
@@ -22,7 +22,7 @@ function upload_to_beta {
 function upload_to_google_play {
     echo "Uploading $1 to Google Play"
     
-    if ./gradlew :$1:publishApkRegularRelease ; then
+    if ./gradlew :$1:publishApkRelease ; then
         webhook $1 "$APP_RELEASE_NAME" "Uploading to Google Play Succeeded"
     else
         webhook $1 "$APP_RELEASE_NAME" "Uploading to Google Play FAILED :("
@@ -39,7 +39,7 @@ function upload_to_google_play {
 # Print the git commit message
 echo "Git commit message: ${GIT_COMMIT_DESC}"
 
-if [[ $GIT_COMMIT_DESC == *"#DEPLOY"* ]]; then
+if [[ $GIT_COMMIT_DESC == *"#PLAY_BETA"* ]]; then
     upload_to_google_play "app"  
 else
     echo "Not publishing to Google Play as deploy not found in commit message"