Created general project structure, updated JavaDoc

.gitignore

@@ -21,3 +21,8 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
+# IntelliJ IDEA project files
+**/.idea/workspace.xml
+**/.idea/tasks.xml
+**/.idea/usage.statistics.xml

beer.umajkla/beer.umajkla.iml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="jdk" jdkName="10" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="core" level="project" />
+    <orderEntry type="library" name="Maven: io.netty:netty-all:4.1.10.Final" level="project" />
+    <orderEntry type="library" name="Maven: commons-cli:commons-cli:1.4" level="project" />
+  </component>
+</module>

beer.umajkla/pom.xml

@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>8</source>
+                    <target>8</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.1.0</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <mainClass>cz.krejcar25.sudoku.Main</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    <groupId>cz.krejcar25</groupId>
+    <artifactId>beer.umajkla</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-all</artifactId>
+            <version>4.1.10.Final</version>
+        </dependency>
+        <dependency>
+            <groupId>commons-cli</groupId>
+            <artifactId>commons-cli</artifactId>
+            <version>1.4</version>
+        </dependency>
+    </dependencies>
+
+</project>

beer.umajkla/src/main/java/beer/umajkla/client/Client.java

@@ -0,0 +1,80 @@
+package beer.umajkla.client;
+
+import java.io.*;
+import java.net.*;
+
+public class Client implements Runnable {
+    private Socket socket = null;
+    private Thread thread = null;
+    private DataInputStream console = null;
+    private DataOutputStream streamOut = null;
+    private ClientThread client = null;
+
+    public Client(String serverName, int serverPort) {
+        System.out.println("Establishing connection. Please wait ...");
+        try {
+            socket = new Socket(serverName, serverPort);
+            System.out.println("Connected: " + socket);
+            start();
+        } catch (UnknownHostException e) {
+            System.out.println("Host unknown: " + e.getMessage());
+        } catch (IOException e) {
+            System.out.println("Unexpected exception: " + e.getMessage());
+        }
+    }
+
+    public void run() {
+        while (thread != null) {
+            try {
+                send(console.readLine());
+            } catch (IOException e) {
+                System.out.println("Sending error: " + e.getMessage());
+                stop();
+            }
+        }
+    }
+
+    public void send(String text) {
+        try {
+            streamOut.writeUTF(text);
+            streamOut.flush();
+        } catch (IOException e) {
+            System.out.println("Sending error: " + e.getMessage());
+            stop();
+        }
+    }
+
+    public void handle(String msg) {
+        if (msg.equals("/bye")) {
+            System.out.println("Good bye. Press RETURN to exit ...");
+            stop();
+        } else
+            System.out.println(msg);
+    }
+
+    public void start() throws IOException {
+        console = new DataInputStream(System.in);
+        streamOut = new DataOutputStream(socket.getOutputStream());
+        if (thread == null) {
+            client = new ClientThread(this, socket);
+            thread = new Thread(this);
+            thread.start();
+        }
+    }
+
+    public void stop() {
+        if (thread != null) {
+            thread.stop();
+            thread = null;
+        }
+        try {
+            if (console != null) console.close();
+            if (streamOut != null) streamOut.close();
+            if (socket != null) socket.close();
+        } catch (IOException e) {
+            System.out.println("Error closing ...");
+        }
+        client.close();
+        client.stop();
+    }
+}