Cleared some JavaDoc warnings

src/main/java/com/hierynomus/sshj/backport/Sockets.java

@@ -9,7 +9,7 @@ public class Sockets {
     /**
      * Java 7 and up have Socket implemented as Closeable, whereas Java6 did not have this inheritance.
      * @param socket The socket to wrap as Closeable
-     * @return
+     * @return The (potentially wrapped) Socket as a Closeable.
      */
     public static Closeable asCloseable(final Socket socket) {
         if (Closeable.class.isAssignableFrom(socket.getClass())) {

src/main/java/net/schmizz/sshj/SocketClient.java

@@ -61,7 +61,7 @@ public abstract class SocketClient {
      * @param port The port to connect to.
      * @param proxy The proxy to connect via.
      * @deprecated This method will be removed after v0.12.0. If you want to connect via a proxy, you can do this by injecting a {@link javax.net.SocketFactory}
-     *             into the SocketClient. The SocketFactory should create sockets using the {@link java.net.Socket(java.net.Proxy)} constructor.
+     *             into the SocketClient. The SocketFactory should create sockets using the {@link java.net.Socket#Socket(java.net.Proxy)} constructor.
      */
     @Deprecated
     public void connect(InetAddress host, int port, Proxy proxy) throws IOException {
@@ -86,7 +86,7 @@ public abstract class SocketClient {
      * @param port The port to connect to.
      * @param proxy The proxy to connect via.
      * @deprecated This method will be removed after v0.12.0. If you want to connect via a proxy, you can do this by injecting a {@link javax.net.SocketFactory}
-     *             into the SocketClient. The SocketFactory should create sockets using the {@link java.net.Socket(java.net.Proxy)} constructor.
+     *             into the SocketClient. The SocketFactory should create sockets using the {@link java.net.Socket#Socket(java.net.Proxy)} constructor.
      */
     @Deprecated
     public void connect(String hostname, int port, Proxy proxy) throws IOException {
@@ -120,7 +120,7 @@ public abstract class SocketClient {
      * @param host The host address to connect to.
      * @param proxy The proxy to connect via.
      * @deprecated This method will be removed after v0.12.0. If you want to connect via a proxy, you can do this by injecting a {@link javax.net.SocketFactory}
-     *             into the SocketClient. The SocketFactory should create sockets using the {@link java.net.Socket(java.net.Proxy)} constructor.
+     *             into the SocketClient. The SocketFactory should create sockets using the {@link java.net.Socket#Socket(java.net.Proxy)} constructor.
      */
     @Deprecated
     public void connect(InetAddress host, Proxy proxy) throws IOException {
@@ -132,7 +132,7 @@ public abstract class SocketClient {
      * @param hostname The host name to connect to.
      * @param proxy The proxy to connect via.
      * @deprecated This method will be removed after v0.12.0. If you want to connect via a proxy, you can do this by injecting a {@link javax.net.SocketFactory}
-     *             into the SocketClient. The SocketFactory should create sockets using the {@link java.net.Socket(java.net.Proxy)} constructor.
+     *             into the SocketClient. The SocketFactory should create sockets using the {@link java.net.Socket#Socket(java.net.Proxy)} constructor.
      */
     @Deprecated
     public void connect(String hostname, Proxy proxy) throws IOException {

src/main/java/net/schmizz/sshj/connection/ConnectionImpl.java

@@ -66,7 +66,7 @@ public class ConnectionImpl
      *
      * @param config the ssh config
      * @param trans transport layer
-     * @param keepAlive
+     * @param keepAlive the keep alive provider
      */
     public ConnectionImpl(Transport trans, KeepAliveProvider keepAlive) {
         super("ssh-connection", trans);