Inital commit (#562)

src/main/java/org/gitlab4j/api/models/MergeRequestDiff.java

+package org.gitlab4j.api.models;
+
+import java.util.Date;
+
+import org.gitlab4j.api.Constants.MergeRequestState;
+import org.gitlab4j.api.utils.JacksonJson;
+
+public class MergeRequestDiff {
+
+    private Integer id;
+    private String headCommitSha;
+    private String baseCommitSha;
+    private String startCommitSha;
+    private Date createdAt;
+    private Integer mergeRequestId;
+    private MergeRequestState state;
+    private String realSize;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getHeadCommitSha() {
+        return headCommitSha;
+    }
+
+    public void setHeadCommitSha(String headCommitSha) {
+        this.headCommitSha = headCommitSha;
+    }
+
+    public String getBaseCommitSha() {
+        return baseCommitSha;
+    }
+
+    public void setBaseCommitSha(String baseCommitSha) {
+        this.baseCommitSha = baseCommitSha;
+    }
+
+    public String getStartCommitSha() {
+        return startCommitSha;
+    }
+
+    public void setStartCommitSha(String startCommitSha) {
+        this.startCommitSha = startCommitSha;
+    }
+
+    public Date getCreatedAt() {
+        return createdAt;
+    }
+
+    public void setCreatedAt(Date createdAt) {
+        this.createdAt = createdAt;
+    }
+
+    public Integer getMergeRequestId() {
+        return mergeRequestId;
+    }
+
+    public void setMergeRequestId(Integer mergeRequestId) {
+        this.mergeRequestId = mergeRequestId;
+    }
+
+    public MergeRequestState getState() {
+        return state;
+    }
+
+    public void setState(MergeRequestState state) {
+        this.state = state;
+    }
+
+    public String getRealSize() {
+        return realSize;
+    }
+
+    public void setRealSize(String realSize) {
+        this.realSize = realSize;
+    }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
+}