Add the skeleton of the java classes needed for this project

src/Client.java

+public class Client {
+
+    // controller port to communicate with
+    int cport;
+    // timeout in milliseconds
+    long timeout;
+
+    public Client(int cport, long timeout) {
+        this.cport = cport;
+        this.timeout = timeout;
+    }
+}
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src/Controller.java

+import java.io.*;
+import java.net.*;
+
+public class Controller {
+
+    // port to listen on
+    private int cport;
+    // replication factor => number of Dstores to join
+    private int R;
+    // timeout in milliseconds
+    private long timeout;
+    // how long to wait to start the next rebalance operation
+    private long rebalance_period;
+
+    public Controller (int cport, int R, long timeout, long rebalance_period) {
+        this.cport = cport;
+        this.R = R;
+        this.timeout = timeout;
+        this.rebalance_period = rebalance_period;
+    }
+
+    // orchestrates client requests
+    // maintains an index with the allocation of files to Dstores
+    // waits for Dstores to join the datastore (rebalance operation)
+    // it doesn't serve any client request until at least R Dstores have joined the system
+}
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src/Dstore.java

+public class Dstore {
+
+    // port to listen on
+    int port;
+    // controller's port to talk to
+    int cport;
+    // timeout in milliseconds
+    long timeout;
+    // where to store the data locally
+    String file_folder;
+
+    public Dstore (int port, int cport, long timeout, String file_folder) {
+        this.port = port;
+        this.cport = cport;
+        this.timeout = timeout;
+        this. file_folder = file_folder;
+    }
+}
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