Initial commit (#290).

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

+package org.gitlab4j.api.models;
+
+import javax.xml.bind.annotation.XmlAccessType;
+import javax.xml.bind.annotation.XmlAccessorType;
+import javax.xml.bind.annotation.XmlRootElement;
+
+import org.gitlab4j.api.utils.JacksonJson;
+
+@XmlRootElement
+@XmlAccessorType(XmlAccessType.FIELD)
+public class WikiAttachment {
+
+    public static class Link {
+
+        private String url;
+        private String markdown;
+
+        public String getUrl() {
+            return url;
+        }
+    
+        public void setUrl(String url) {
+            this.url = url;
+        }
+    
+        public String getMarkdown() {
+            return markdown;
+        }
+    
+        public void setMarkdown(String markdown) {
+            this.markdown = markdown;
+        }
+
+        @Override
+        public String toString() {
+            return (JacksonJson.toJsonString(this));
+        }
+    }
+
+
+    private String fileName;
+    private String filePath;
+    private String branch;
+    private Link link;
+
+    public String getFileName() {
+        return fileName;
+    }
+
+    public void setFileName(String fileName) {
+        this.fileName = fileName;
+    }
+
+    public String getFilePath() {
+        return filePath;
+    }
+
+    public void setFilePath(String filePath) {
+        this.filePath = filePath;
+    }
+
+    public String getBranch() {
+        return branch;
+    }
+
+    public void setBranch(String branch) {
+        this.branch = branch;
+    }
+
+    public Link getLink() {
+        return link;
+    }
+
+    public void setLink(Link link) {
+        this.link = link;
+    }
+
+    @Override
+    public String toString() {
+        return (JacksonJson.toJsonString(this));
+    }
+}