update dependency and JDK version

Author: KengoTODA

pom.xml

@@ -34,26 +34,41 @@
 	</properties>
 
 	<dependencies>
+		<dependency>
+			<groupId>com.google.guava</groupId>
+			<artifactId>guava</artifactId>
+			<version>15.0</version>
+		</dependency>
+		<dependency>
+			<groupId>com.google.code.findbugs</groupId>
+			<artifactId>jsr305</artifactId>
+			<version>2.0.2</version>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.hamcrest</groupId>
+			<artifactId>hamcrest-library</artifactId>
+			<version>1.2.1</version>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
 			<version>4.11</version>
-			<type>jar</type>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
 
 	<build>
 		<plugins>
-			
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
-				<version>2.3.2</version>
+				<version>2.5.1</version>
 				<configuration>
-					<source>1.5</source>
-					<target>1.5</target>
-					<encoding>UTF-8</encoding>
+					<source>1.7</source>
+					<target>1.7</target>
+					<encoding>${project.build.sourceEncoding}</encoding>
 				</configuration>
 			</plugin>